H3C S9500 Series User manual

Operation Manual – MSDP
H3C S9500 Series Routing Switches Table of Contents
i
Table of Contents
Chapter 1 MSDP Configuration....................................................................................................1-1
1.1 MSDP Overview.................................................................................................................1-1
1.1.1 Introduction..............................................................................................................1-1
1.1.2 Working Principle .................................................................................................... 1-2
1.2 MSDP Configuration..........................................................................................................1-4
1.2.1 Enabling MSDP.......................................................................................................1-4
1.2.2 Configuring MSDP Peers........................................................................................1-5
1.2.3 Configuring Static RPF Peers.................................................................................1-5
1.2.4 Configuring Originating RP .....................................................................................1-6
1.2.5 Configuring SA Caching State ................................................................................1-6
1.2.6 Configuring the Maximum Number of SA Caching.................................................1-7
1.2.7 Requesting Source Information of MSDP Peers..................................................... 1-7
1.2.8 Controlling the Source Information Created............................................................1-7
1.2.9 Controlling the Source Information Forwarded.......................................................1-8
1.2.10 Controlling the Received Source Information .......................................................1-9
1.2.11 Configuring MSDP Mesh Group..........................................................................1-10
1.2.12 Configuring the MSDP Connection Retry Period................................................1-10
1.2.13 Shutting MSDP Peers Down...............................................................................1-11
1.2.14 Clearing MSDP Connections, Statistics and SA Caching Configuration............1-11
1.3 Displaying and Maintaining MSDP .................................................................................. 1-11
1.4 MSDP Configuration Examples.......................................................................................1-12
1.4.1 Configuring Static RPF Peers...............................................................................1-12
1.4.2 Configuring Anycast RP........................................................................................1-14
1.4.3 MSDP Integrated Networking................................................................................1-17

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-1
Chapter 1 MSDP Configuration
When configuring MSDP, go to these sections for information you are interested in:
zMSDP Overview
zMSDP Configuration
zDisplaying and Maintaining MSDP
zMSDP Configuration Examples
1.1 MSDP Overview
1.1.1 Introduction
No ISP would like to forward multicast traffic by RPs of competitors, but do expect to
obtain information from the source and distribute it among the members, regardless of
the location of the multicast source RP. MSDP is proposed to solve this problem.
Multicast source discovery protocol (MSDP) describes interconnection mechanism of
multiple PIM-SM domains. It is used is to discover multicast source information in other
PIM-SM domains. MSDP allows the RPs of different domains to share the multicast
source information, but all these domains must use PIM-SM as their intro-domain
multicast routing protocol.
A RP configured with MSDP peer notifies all of its MSDP peers of the active multicast
source message in its domain via a source active (SA) message. In this way, multicast
source information in a PIM-SM domain is transmitted to another PIM-SM domain.
MSDP peer relationship can be established between RPs in different domains or in a
domain, between a RP and a common router, or between common routers. The
connection between MSDP peers is a TCP connection.
MSDP makes a PIM-SM domain independent of the RP in another PIM-SM domain.
After getting multicast source information in that domain, the receiver here can join
directly to the SPT of the multicast source in that domain.
Another application of MSDP is Anycast RP. In a domain, configure a certain interface
(usually Loopback interface) on different routers with the same IP address; designate
these interfaces as C-RPs; and create MSDP peer relationship among them. After the
unicast route convergence, the multicast source can select the nearest RP for
registration, and the receiver can also select the nearest RP to add into its RPT. The
RPs exchange individual registration source information via MSDP peers. Therefore,
every RP knows all multicast sources of the entire domain; and every receiver on each
RP can receive multicast data from all the multicast sources in the entire domain.

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-2
By initiating registration and RPT joining to the nearest RP, MSDP implements RP load
sharing. Once an RP turns invalid, its original registered source and receivers will
select another nearest RP, implementing redundant RP backup.
In addition, MSDP only accepts the SA messages from the correct paths and excludes
redundant SAmessages through RPF check mechanism, and prevents the flooding of
SA messages among MSDP peers by configuring Mesh Group.
1.1.2 Working Principle
I. Identifying multicast source and receiving multicast data
As shown in Figure 1-1, the RPs of PIM-SM domains 1, 2 and 3 establish peer
relationship between them. Domain 3 contains a group member.
5
5
Figure 1-1 MSDP working principles (I)
When the multicast source in domain 1 sends data to the multicast group, the working
process of the member in domain 3, from discovering the multicast source to receiving
data from the source, includes the following:
The multicast source in PIM-SM domain 1 begins to send datagram.
The DR connected to the multicast source encapsulates the datagram into a Register
packet and forward it to the RP in domain 1.
The RP in domain 1 decapsulates the packet and forwards it along the RPT to all the
members within the domain. The domain members can choose whether to switch to the
SPT.
The RP in domain 1 generates an SA message for the MSDP peers (the RPs in
PIM-SM domain 2 and domain 3). The SA message contains multicast source IP
address, multicast group address and the address of the RP that generates the

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-3
message. Besides, the RP in domain 1 encapsulates the first received multicast data
into this SA message.
If there is any group member in the domain of an MSDPpeer (in the figure, it is PIM-SM
domain 3), the RP in this domain sends the multicast data encapsulated in the SA
message to group members along the RPT and the join message to multicast source.
After the reverse forwarding path is created, the multicast source data is sent directly to
the RP in domain 3, and then the RP forwards the data along the RPT. In this case, the
last hop router connected with the group member in domain 3 can choose whether to
switch to SPT.
II. Message forwarding and RPF check between MSDP peers
As shown in Figure 1-2, Switch A belongs to domain 1, Switch B, Switch C, and Switch
D to domain 2, and Switch E and Switch F to domain 3. MSDP peer relationship is
established between them, indicated with bi-directional arrows in the figure. Among
them, Mesh Group is created among Switch B, Switch C and Switch D.
Source Switch A
AS 1
AS 2
Switch B
Switch C
Switch D
Mesh Group
Switch E
Switch F
Static Peer
AS 3
Figure 1-2 MSDP working principles (II)
The SA message forwarding and RPF check among these MSDP peers are illustrated
as follows:
If the SA message is from a MSDP peer that is the RP of the multicast source, it is
received and forwarded to other peers (for example, from SwitchA to Switch B).
If the SA message is from a MSDP peer that has only one peer, it is received (for
example, from Switch B to Switch A).
If the SAmessage is from a static RPF peer, it is received and forwarded to other peers
(for example, from Switch D to Switch E).
If the SAmessage is from a MSDP peer in Mesh Group, it is received and forwarded to
the peers outside the Mesh Group (for example, from Switch B to Switch D).

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-4
If the SA message is sent from a MSDP peer in the same domain, and the peer is the
next hop along the optimal path to the RP in the domain of source, it is received and
forwarded to other peers (for example, from Switch E to Switch F).
If the SA message is sent from a MSDP peer in a different domain which is the next
autonomous domain along the optimal path to the RP in the domain of source, it is
received and forwarded to other peers (for example, Switch D to Switch F).
For other SA messages, they are neither received nor forwarded.
III. Precautions for configuration
The router running MSDP must also run BGP or MBGP. It is recommended to use the
same IP address of the MSDP peer with that of the BGP peer or MBGP peer. If neither
BGP nor MBGP is in operation, a static RPF peer should be configured.
1.2 MSDP Configuration
Basic configuration tasks of MSDP include
zEnabling MSDP
zConfiguring MSDP Peers
Advanced configuration tasks of MSDP include
zConfiguring Static RPF Peers
zConfiguring Originating RP
zConfiguring SA Caching State
zConfiguring the Maximum Number of SA Caching
zRequesting Source Information of MSDP Peers
zControlling the Source Information Created
zControlling the Source Information Forwarded
zControlling the Received Source Information
zConfiguring MSDP Mesh Group
zConfiguring the MSDP Connection Retry Period
zShutting MSDP Peers Down
zClearing MSDP Connections, Statistics and SA Caching Configuration
1.2.1 Enabling MSDP
To configure MSDP, you must enable MSDP first.
Perform the following operation in system view to enable/disable MSDP:
To do... Use the command...
Enable MSDP and enter MSDP view msdp
Clear all MSDP configurations undo msdp

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-5
1.2.2 Configuring MSDP Peers
To run MSDP, you need to configure MSDP peers locally.
Perform the following operations in MSDP view to configure MSDP peers:
To do... Use the command...
Configure MSDP peers peer peer-address connect-interface
interface-type interface-number
Remove MSDP peer configuration undo peer peer-address
Add description to a MSDP peer peer peer-address description text
Remove the description undo peer peer-address description text
The command to add description is optional.
If the local router is also in BGP Peer relation with an MSDP peer, the MSDP peer and
the BGP peer should use the same IP address.
Neither of any two routers between which MSDP peer relationship has been
established must run BGP or MBGP, as long as they have a BGP or MBGP route
between them. If no BGP of MBGP route exists between them, you must configure
static RPF peers.
1.2.3 Configuring Static RPF Peers
Perform the following operation in MSDP view to configure/remove static RPF peers:
To do... Use the command...
Configure static RPF peers static-rpf-peer peer-address [ rp-policy
ip-prefix-name]
Remove static RPF peer configuration undo static-rpf-peer peer-address
By default, no static RPF peer is configured.
Note:
zThe peer command must be configured before the static-rpf-peer command.
zIf only one MSDP peer is configured via the peer command, the MSDP peer will be
regarded as the static RPF peer.
To configure multiple static RPF peers at the same time, take either of the two methods:

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-6
zUsing rp-policy parameters universally: Multiple static RPF peers take effect at
the same time and SA messages are filtered by the RP addresses contained
according to the configured prefix list. If multiple static RPF peers using the same
rp-policy parameter are configured, any peer that receives an SA message will
forward it to the other peers.
zNot using the rp-policy parameter universally: According to the configuration
sequence, only the first static RPF peerwhose connection state is UP is activated.
All SA messages from the peer will be received and those from other static RPF
peers will be discarded. Once the activated static RPF peer turns invalid (for
example, the configuration is removed or the connection is interrupted), the
following first static RPF peer with UP connection state according to the
configuration sequence will assume its role.
1.2.4 Configuring Originating RP
During the creation of SA message, an MSDP peer can be configured to use the IP
address of a specified interface as the RP address in its SAmessage.
Perform the following operation in MSDP view to configure/remove originating RP:
To do... Use the command...
Configure an MSDP peer to use the IP address of
a specified interface as the RP address of its SA
message
originating-rp interface-type
interface-number
Remove the above operation undo originating-rp
By default, the RP address in SAmessage is the one configured by PIM.
1.2.5 Configuring SA Caching State
When SAmessages are cached on a router, the new join-in groups can directly access
all the active sources and join the corresponding source tree, instead of waiting for the
arrival of the next SA message.
Perform the following operation in MSDP view to configure/disable SAcaching state:
To do... Use the command...
Configure SA caching state cache-sa-enable
Disable SA caching state undo cache-sa-enable
By default, the router caches the SAstate, or rather the (S, G) entry when receiving an
SA message.
Some memory is consumed as the join delay of groups is shortened by this
configuration.

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-7
1.2.6 Configuring the Maximum Number of SA Caching
To prevent Deny of Service (DoS) attacks, you can set the maximum number of SAs
cached on the router.
Perform the following operation in MSDP view to configure/restore the maximum
number of SA caching:
To do... Use the command...
Configuring the maximum number of SA
caching peer peer-address sa-cache-maximum
sa-limit
Restore the default configuration undo peer peer-address
sa-cache-maximum
By default, the maximum number of SA caching is 2048.
1.2.7 Requesting Source Information of MSDP Peers
When a new group joins, the router will send a SA request message to the specified
MSDP peer, and the MSDP peer will respond with the SA messages it caches. If the
MSDP peer does not enable the SAcaching, the configuration is invalid.
Perform the following operations in MSDP view to request source information of MSDP
peers or restore the default configuration:
To do... Use the command...
Configure the router to send SA request
message to the specified MSDP peer when
receiving the join message of a group
peer peer-address
request-sa-enable
Restore the default configuration undo peer peer-address
request-sa-enable
The SA request message sent by a local RP will get the immediate response about all
active sources.
By default, the router does not send SA request message to its MSDP peer when
receiving the join message of a group. Instead, it waits for the arrival of SAmessage of
the next period.
1.2.8 Controlling the Source Information Created
I. Filtering the multicast routing entries imported
RP filters the registered sources to control the information of the active sources
advertised in SA message. MSDP peers can be configured to only advertise the

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-8
qualified (S, G) entries in the multicast routing table when creating SAmessages, that is,
to control the (S,G) entries imported from the multicast routing table to the domain.
Perform the following operations in MSDP view to filter the multicast routing entries
imported or remove the configuration:
To do... Use the command...
Advertise only the (S, G) entries
permitted by the ACL import-source [ acl acl-number ]
Remove the above configuration undo import-source
By default, only intra-domain sources are advertised in SA messages.
If the import-source command without acl parameter is executed, no source is
advertised in SAmessages.
II. Filtering SA request messages
Perform the following operations in MSDP view to filter SA request messages or
remove the configuration:
To do... Use the command...
Filter all the SA request messages from
a specified MSDP peer peer peer-address sa-request-policy
Filter the SA request messages of the
groups of a specified MSDP peer
permitted by the basic ACL from
peer peer-address sa-request-policy
acl acl-number
Remove the configuration of filtering SA
request messages undo peer peer-address
sa-request-policy
By default, only the routers which caches SA messages can respond to SA request
messages. Routers receive all SArequest messages from its MSDP peers.
Multicast group addresses are described in ACL. If no ACL is specified, all SA request
messages sent by the corresponding MSDP peer willbe ignored. If an ACLis specified,
only SA request messages of the groups permitted by theACL will be processed.
1.2.9 Controlling the Source Information Forwarded
Controlling of source information also includes that of forwarding and receiving source
information besides that of creating source information. The outbound filter or time to
live (TTL) threshold of SAmessages can be used to control the SAmessage forwarding.
By default, all SA messages are forwarded to other MSDP peers.
I. Using MSDP outbound filter
MSDP outbound filter of are functional in:

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-9
zFiltering off all the (S, G) entries
zForwarding only the SA messages permitted by the advanced ACL
Perform the following operations in MSDP view to use MSDP outbound filter to control
the source information forwarded:
To do... Use the command...
Filter off all the SA messages to a specified
MSDP peer peer peer-address sa-policy export
Forward the SA messages permitted by the
advanced ACL to a specified MSDP peer peer peer-address sa-policy export
acl acl-number
Remove the filtering over the source
information forwarded undo peer peer-address sa-policy
export
II. Using TTL to filter SA messages with encapsulated data
An SAmessage with encapsulated data can reach the specified MSDP peer only when
the TTL in its IP header is no less than the threshold. Therefore, the forwarding of SA
messages with encapsulated data can be controlled by configuring the TTL threshold.
For example, you can set the TTLthreshold for intra-domain multicast traffic to 10 if you
wish to restrict SA messages with TTL less than or equal to 10 carrying encapsulated
data from being propagated. If you set the TTLthreshold greater than 10, then they can
be propagated to outside.
Perform the following operations in MSDP view to use TTL to filter SA messages with
encapsulated data or the remove the configuration:
To do... Use the command...
Filter off the multicast data encapsulated
in the first SA message aiming at a
specified MSDP peer peer peer-address minimum-ttl ttl
Remove the TTL threshold configuration undo peer peer-address minimum-ttl
The default value of TTL threshold is 0.
1.2.10 Controlling the Received Source Information
Perform the following operations in MSDP view to control the received source
information:
To do... Use the command...
Filter off the SA messages from a specified
MSDP peer peer peer-address sa-policy import

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-10
To do... Use the command...
Receive the SA messages permitted by the
advanced ACL from a specified MSDP peer peer peer-address sa-policy import
acl acl-number
Remove the filtering rule over received
source information undo peer peer-address sa-policy
import
Similar to MSDP outbound filter in function, MSDP inbound filter controls the received
SA messages. By default, the SA messages from all peers are accepted.
1.2.11 Configuring MSDP Mesh Group
Mesh Group is useful when full connection among MSDP peers is required but SA
message flooding shall be prevented.
In a Mesh group, SAmessages from outside the group are forwarded to other members
in the group, but the SA messages from peers inside the group will not be performed
with Peer-RPF check or forwarded in the group. In this case, the overflow of SA
messages is avoided and Peer-RPF is simplified, as BGP or MBGP is not required
between MSDP peers.
Perform the following operations in MSDP view to configure/remove MSDP full
connection group:
To do... Use the command...
Configure an MSDP peer to be a
member of an MSDP Mesh Group peer peer-address mesh-group name
Delete that member from the Group undo peer peer-address mesh-group
name
If an MSDP peer is configured into different mesh groups, only the last configuration is
valid.
1.2.12 Configuring the MSDP Connection Retry Period
Perform the following operations in MSDP view to configure/restore the MSDP
connection retry period:
To do... Use the command...
Configuring the MSDP connection retry period timer retry seconds
Restore the default value of MSDP connection
retry interval undo timer retry
By default, MSDP connection is retried at the interval of 30 seconds.

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-11
1.2.13 Shutting MSDP Peers Down
The session between MSDP peers can be cut off and re-activated as needed.
If a session between MSDP peers is cut off, the TCP connection will terminate with no
retry effort, but the configuration information will be reserved.
Perform the following operations in MSDP view to shut down/turn up MSDP peers:
To do... Use the command...
Shut down a specified MSDP peer shutdown peer-address
Turn the MSDP peer up undo shutdown peer-address
By default, MSDP peer is enabled.
1.2.14 Clearing MSDP Connections, Statistics and SA Caching Configuration
Perform the following operations in user view to clearMSDP connections, statistics and
SA caching configuration:
To do... Use the command...
Clear a specified TCP connection and
reset the counters of all MSDP
information reset msdp peer peer-address
Clear MSDP peer statistics reset msdp statistics [ peer-address ]
Clear cached SA entries of MSDP reset msdp sa-cache [ group-address ]
1.3 Displaying and Maintaining MSDP
I. Displaying and debugging MSDP
To do... Use the command... Remarks
Display the numbers of
sources and groups of SA
messages from a
specified autonomous
domain
display msdp sa-count
[as-number ] Available in any view
Display the details of a
MSDP peer display msdp peer-status [ peer-address ] Available in any view
Display the (S, G) state
learnt from MSDP peer
display msdp sa-cache
[ group-address | source-address |
as-number ] *
Available in
any view
Display MSDP peer state display msdp brief Available in
any view

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-12
To do... Use the command... Remarks
Enable MSDP debugging debugging msdp { all |connect |
event | packet |source-active } Available in user view
Caution:
The display msdp sa-count command give output only after the cache-sa-enable
command is executed.
II. Tracing the transmission path of SA messages on the network
The msdp-tracert command can be used in any view to trace the network path of
multicast data from multicast source to destination receiver and locate faults.
Perform the follow operation to trace the transmission path of SA messages on the
network:
To do... Use the command...
Trace the transmission
path of SA messages on
the network
msdp-tracert { source-address } { group-address }
{rp-address }[max-hops max-hops ] [ next-hop-info ]
[sa-info ] [ peer-info ] [ skip-hops skip-hops ] *
Locating information loss and reducing configuration faults can be realized by tracing
the network path of the specified (S, G, RP) entries. After the transmission path of SA
messages is determined, the overflow of SA messages can be avoided by the correct
configuration.
1.4 MSDP Configuration Examples
1.4.1 Configuring Static RPF Peers
I. Network requirements
In the following network environment shown in Figure 1-3, four H3C S9500 series
routing switches are in the different PIM-SM domains with no BGP or MBGP running
among them.
To enable Switch D to receive the specified source information from PIM-SM domains 1,
2 and 3, you can configure static RPF peers with the rp-policy Argument.

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-13
After the configuration is complete, Switch D will only receive SA messages permitted
by the corresponding filtering policy from its static RPF peers.
II. Network diagram
PIM-SM 1
PIM-SM 4
PIM-SM 3 PIM-SM 2
Switch A
Switch D
Switch C Switch B
Static RPF peer
Static RPF peer
Static RPF peer
Static RPF peer
10.1.1.1
Vlan-interface 10
Vlan-interface 20
Vlan-interface 30
SA
SA
SA
Figure 1-3 Configure static RPF peers
III. Configuration procedure
Configure Switch D as follows:
# Configure Switch A to be a static RPF peer of Switch D.
<SwitchD> system-view
System View: return to User View with Ctrl+Z.
[SwitchD] ip ip-prefix list-a permit 10.10.0.0 16
[SwitchD] msdp
[SwitchD-msdp] peer 10.10.1.1 connect-interface Vlan-interface 10
[SwitchD-msdp] static-rpf-peer 10.10.1.1 rp-policy list-a
[SwitchD-msdp] quit
# Configure Switch B to be a static RPF peer of Switch D.
[SwitchD] ip ip-prefix list-b permit 10.21.0.0 16
[SwitchD] msdp
[SwitchD-msdp] peer 10.21.1.1 connect-interface Vlan-interface 20
[SwitchD-msdp] static-rpf-peer 10.21.1.1 rp-policy list-b
[SwitchD-msdp] quit
# Configure Switch C to be a static RPF peer of Switch D.
[SwitchD] ip ip-prefix list-c permit 10.25.0.0 16

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-14
[SwitchD] msdp
[SwitchD-msdp] peer 10.25.1.1 connect-interface Vlan-interface30
[SwitchD-msdp] static-rpf-peer 10.25.1.1 rp-policy list-c
1.4.2 Configuring Anycast RP
I. Network requirements
To configure Anycast RP in the PIM-SM domain, establish MSDP peer relationship
between Switch A and Switch B; use the address of Loopback 0 on Switch A and
Switch B to send out SA messages; set Loopback 10 on Switch A and Switch B as
BSR/RP and configure the Anycast RP address. In this way, when a unicast group
member joins, the switch directly connected to the host can originate a join message to
the nearest RP in the topology.
Note:
This example focuses on the configuration of Switch A and Switch B. Configuration
performed on Switch E, Switch D and Switch C is omitted as it mainly concerns
enabling multicast and enabling PIM-SM on the interfaces.
II. Network diagram
Figure 1-4 Network diagram for Anycast RP configuration
III. Configuration procedure
1) Configure Switch B
# Configure VLAN.
<SwitchB> system-view
System View: return to User View with Ctrl+Z.
[SwitchB] vlan 10

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-15
[SwitchB-vlan10] port ethernet1/1/2
[SwitchB-vlan10] quit
[SwitchB] vlan 20
[SwitchB-vlan20] port ethernet1/1/3
[SwitchB-vlan20] quit
# Enable multicast routing.
[SwitchB] multicast routing-enable
# Configure the IP address of interface Loopback 0.
[SwitchB] interface loopback0
[SwitchB-LoopBack0] ip address 10.10.1.1 255.255.255.255
[SwitchB-LoopBack0] quit
# Configure the IP address of interface Loopback 10 and enable IGMP and PIM-SM.
[SwitchB] interface loopback10
[SwitchB-LoopBack10] ip address 10.1.1.1 255.255.255.255
[SwitchB-LoopBack10] igmp enable
[SwitchB-LoopBack10] pim sm
[SwitchB-LoopBack10] quit
# Configure the IP address of VLAN-interface 10 and enable IGMP and PIM-SM.
[SwitchB] interface Vlan-interface10
[SwitchB-Vlan-interface10] ip address 10.10.2.1 255.255.255.0
[SwitchB-Vlan-interface10] igmp enable
[SwitchB-Vlan-interface10] pim sm
[SwitchB-Vlan-interface10] undo shutdown
[SwitchB-Vlan-interface10] quit
# Configure the IP address of VLAN-interface 20 and enable IGMP and PIM-SM.
[SwitchB] interface Vlan-interface20
[SwitchB-Vlan-interface20] ip address 10.10.3.1 255.255.255.0
[SwitchB-Vlan-interface20] igmp enable
[SwitchB-Vlan-interface20] pim sm
[SwitchB-Vlan-interface20] undo shutdown
[SwitchB-Vlan-interface20] quit
# Configure OSPF.
[SwitchB] ospf
[SwitchB-ospf-1] area 0
[SwitchB-ospf-1-area-0.0.0.0] network 10.10.2.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 10.10.3.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 10.1.1.1 0.0.0.0
[SwitchB-ospf-1-area-0.0.0.0] network 10.10.1.1 0.0.0.0
[SwitchB-ospf-1-area-0.0.0.0] quit

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-16
[SwitchB-ospf-1] quit
# Configure Switch A as its MSDP peer.
[SwitchB] msdp
[SwitchB-msdp] peer 10.21.1.1 connect-interface loopback 0
# Configure Originating RP.
[SwitchB-msdp] originating-rp loopback0
[SwitchB-msdp] quit
# Configure C-RP and BSR.
[SwitchB] pim
[SwitchB-pim] c-rp loopback 10
[SwitchB-pim] c-bsr loopback 10 30
2) Configure Switch A.
# Configure VLAN.
<SwitchA> system-view
System View: return to User View with Ctrl+Z.
[SwitchA] vlan 10
[SwitchA-vlan10] port ethernet1/1/2
[SwitchA-vlan10] quit
[SwitchA] vlan 20
[SwitchA-vlan20] port ethernet1/1/3
[SwitchA-vlan20] quit
# Enable multicast routing.
[SwitchA] multicast routing-enable
# Configure the IP address of interface Loopback 0.
[SwitchA] interface loopback0
[SwitchA-LoopBack0] ip address 10.21.1.1 255.255.255.255
[SwitchA-LoopBack0] quit
# Configure the IP address of interface Loopback 10 and enable IGMP and PIM-SM.
[SwitchA] interface loopback10
[SwitchA-LoopBack10] ip address 10.1.1.1 255.255.255.255
[SwitchA-LoopBack10] igmp enable
[SwitchA-LoopBack10] pim sm
[SwitchA-LoopBack10] quit
# Configure the IP address of interface VLAN-interface 20 and enable IGMP and
PIM-SM.
[SwitchA] interface Vlan-interface20
[SwitchA-Vlan-interface20] ip address 10.21.2.1 255.255.255.0
[SwitchA-Vlan-interface20] igmp enable

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-17
[SwitchA-Vlan-interface20] pim sm
[SwitchA-Vlan-interface20] undo shutdown
[SwitchA-Vlan-interface20] quit
# Configure the IP address of VLAN-interface 10 and enable IGMP and PIM-SM.
[SwitchA] interface Vlan-interface10
[SwitchA-Vlan-interface10] ip address 10.21.3.1 255.255.255.0
[SwitchA-Vlan-interface10] igmp enable
[SwitchA-Vlan-interface10] pim sm
[SwitchA-Vlan-interface10] undo shutdown
[SwitchA-Vlan-interface10] quit
# Configure OSPF route.
[SwitchA] ospf
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] network 10.21.2.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 10.21.3.0 0.0.0.255
[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] network 10.21.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# Configure Switch B as its MSDP peer.
[SwitchA] msdp
[SwitchA-msdp] peer 10.10.1.1 connect-interface loopback 0
# Configure Originating RP.
[SwitchA-msdp] originating-rp loopback0
[SwitchA-msdp] quit
# Configure C-RP and BSR.
[SwitchA] pim
[SwitchA-pim] c-rp loopback 10
[SwitchA-pim] c-bsr loopback 10 30
1.4.3 MSDP Integrated Networking
I. Network requirement
In the following network, enable MSDP and configure an Anycast RP in PIM-SM
domain 1; establish MSDP peer relationship among RPs across PIM-SM domains; and
use MBGP between domains. For the related commands, refer to the part of MBGP
configuration examples in MBGP Configuration of the IP Multicast Volume.

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-18
II. Network diagram
Switch G
Switch I
Switch H
PIM-SM 3 PIM-SM 4
PIM-SM 2
SRC A
SRC B SRC C
Switch A
Switch B
Switch C Switch D
Switch E Switch F
Eth1/1/2
Eth1/1/3 Eth1/1/4
Eth1/1/2
Eth1/1/3
Eth:10.25.2.0
Eth:10.26.2.0 Eth:10.27.2.0
PIM-SM 1
Device Interface IP Address Device Interface IP Address
Switch A Loop0 10.25.1.1 Switch B Loop0 10.25.1.2
Loop10 10.1.1.1
Switch C Loop0 10.26.1.1 Switch D Loop0 10.27.1.1
Switch E Loop0 10.26.1.2 Switch F Loop0 10.27.1.2
Loop10 10.1.1.1 Loop10 10.1.1.1
Switch G Loop0 10.28.1.1 Switch H Loop0 10.29.1.1
Switch I Loop0 10.30.1.1
Figure 1-5 MSDP integrated networking
III. Configuration procedure
Note:
The follow procedure details multicast configuration, but briefs router configuration.
1) Configure Switch A
# Configuring VLAN
<SwitchA> system-view
System View: return to User View with Ctrl+Z.
[SwitchA] vlan 10
[SwitchA-vlan10] port ethernet1/1/2
[SwitchA-vlan10] quit
[SwitchA] vlan 30
[SwitchA-vlan30] port ethernet1/1/3

Operation Manual – MSDP
H3C S9500 Series Routing Switches Chapter 1 MSDP Configuration
1-19
[SwitchA-vlan30] quit
# Enable multicast.
[SwitchA] multicast routing-enable
# Configure the IP address of interface Loopback 0 and enable PIM-SM.
[SwitchA] interface loopback0
[SwitchA-LoopBack0] ip address 10.25.1.1 255.255.255.255
[SwitchA-LoopBack0] pim sm
[SwitchA-LoopBack0] quit
# Configure the IP address of interface Loopback 10 and enable PIM-SM.
[SwitchA] interface loopback10
[SwitchA-LoopBack10] ip address 10.1.1.1 255.255.255.255
[SwitchA-LoopBack10] pim sm
[SwitchA-LoopBack10] quit
# Configure the IP address of VLAN-interface 30 and enable IGMP and PIM-SM.
[SwitchA] interface Vlan-interface30
[SwitchA-Vlan-interface30] ip address 10.25.2.3 255.255.255.0
[SwitchA-Vlan-interface30] igmp enable
[SwitchA-Vlan-interface30] pim sm
[SwitchA-Vlan-interface30] undo shutdown
[SwitchA-Vlan-interface30] quit
# Configure the IP address of VLAN-interface 10 and enable IGMP and PIM-SM.
[SwitchA] interface Vlan-interface10
[SwitchA-Vlan-interface10] ip address 10.25.3.1 255.255.255.0
[SwitchA-Vlan-interface10] igmp enable
[SwitchA-Vlan-interface10] pim sm
[SwitchA-Vlan-interface10] undo shutdown
[SwitchA-Vlan-interface10] quit
# Configure OSPF.
[SwitchA] ospf
[SwitchA-ospf-1] area 0
[SwitchA-ospf-1-area-0.0.0.0] network 10.25.2.0 0.255.255.255
[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] network 10.25.1.1 0.0.0.0
[SwitchA-ospf-1-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# Configure BGP.
[SwitchA] bgp 100
[SwitchA-bgp] undo synchronization
[SwitchA-bgp] group in internal