Allied Telesis AR44xS Instruction Manual

Software Maintenance Release Note
Version 276-05
for AR450S and AR44xS series routers, and
Rapier i and AT-8800 series switches
This software maintenance release note lists the issues addressed and enhancements made in Maintenance Version 276-05 for Software Release 2.7.6. Release
details are listed in the following table:
Caution: Using a maintenance version on the wrong model may cause unpredictable results, including disruption to the network.
This maintenance release note should be read in conjunction with the following documents:
■Release Note for Software Version 2.7.6 for AT-8800, Rapier i, AT-8700XL, AT-8600, AT-9900, AT-8900 and AT-9800 Series Switches and AR400 and AR700
Series Routers (document number C613-10462-00 Rev A)
■your router or switch’s Document Set for Software Release 2.7.5. This document set is available on the CD-ROM that shipped with your router or switch,
or from www.alliedtelesis.co.nz/documentation/documentation.html
Caution: Information in this release note is subject to change without notice and does not represent a commitment on the part of Allied Telesis Inc. While every
effort has been made to ensure that the information contained within this document and the features and changes described are accurate, Allied Telesis Inc. can
not accept any type of liability for errors in, or omissions arising from the use of this information.
Models Series Release File Date Size (bytes) GUI file
AR440S, AR441S, AR450S AR400 54276-05.rez 8 September 2006 4512716 d440se27.rsc, d441se27.rsc, d450se27.rsc
Rapier 24i, Rapier 48i, Rapier 16fi Rapier i 86276-05.rez 8 September 2006 4312896 dr24ie27.rsc, dr48ie27.rsc, dr16ie27.rsc
AT-8824, AT-8848 AT-8800 86276-05.rez 8 September 2006 4312896 d8824e27.rsc, d8848e27.rsc

Enabling and Installing this Release 2
Version 276-05
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Enabling and Installing this Release
To use this maintenance release you must have a base release license for Software Release 2.7.6. Contact your distributor or reseller for more information. To
enable this release and install it as the preferred release, use the commands:
enable rel=xx276-05.rez num=2.7.6
set install=pref rel=xx276-05.rez
where xx is the prefix to the filename, as shown in the table on page 1. For example, to install the release on an AR440S router, use the commands:
enable rel=54276-05.rez num=2.7.6
set install=pref rel=54276-05.rez
Levels
The issues addressed in this Maintenance Version include a level number. This number reflects the importance of the issue that has been resolved. The levels
are:
Level 1 This issue will cause significant interruption to network services, and there is no work-around.
Level 2 This issue will cause interruption to network service, however there is a work-around.
Level 3 This issue will seldom appear, and will cause minor inconvenience.
Level 4 This issue represents a cosmetic change and does not affect network operation.

Features in 276-05 3
Version 276-05
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Features in 276-05
Software Maintenance Version 276-05 includes all resolved issues and enhancements in earlier versions, and the resolved issues and enhancements in the
following tables. In the tables, for each product series:
■“Y” in a white column indicates that the resolution is available in Version 276-05 for that product series.
■“-” in a white column indicates that the issue did not apply to that product series.
■a grey-shaded column indicates that Version 276-05 was not released on that product series.
Level 1
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800
CR00013147 ATM 1 Excessive CPU usage was occurring when an SHDSL link was up. This resulted in
low throughput and dropped packets.
This issue has been resolved.
Y - --------
CR00013288 ADSL 1 For AR440S and AR441S ADSL routers, the Annex A and Annex B firmware has
been upgraded. On AR440S routers, this resolves an issue which meant that the
ADSL link could be unreliable at 3km when connected to a specific type of
DSLAM.
Y---------

Features in 276-05 4
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Level 2
Level 3
Level 4
No level 4 issues
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800
CR00012606 STP 2 Processing of an invalid STP packet could result in an STP timeout value being
incorrectly set to 0.
This issue has been resolved, so the timeout can never be set to 0.
---YY-----
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800
CR00013672 ATM 3 An SNMP Walk of the ATM MIB would fail to complete properly, as it would not
advance through the channel list.
This issue has been resolved.
Y - --------

Features in 276-05 5
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Enhancements
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800
CR00012881 IP Gateway - The IP implementation has been enhanced to accept IP interfaces with a /31
netmask. This results in a slightly non-standard subnet that has no network
address or broadcast address. This has become a popular extension to IP, because
it reduces wastage of IP addresses on point-to-point links.
Y--YY-----
CR00013444 IP Gateway - RIPv2 can now use authentication passwords that contain almost any printable
character, including characters such as $, % and &. The ? character is interpreted
as asking for parameter help, so this is not usable anywhere inside a password.
Also, a password cannot contain double quotes (") as the first character of the
string.
The RIP password length is now strictly enforced at 16 characters. The command
handler no longer accepts a password with more characters than this.
Y--YY-----

Features in 276-04 6
Version 276-05
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Features in 276-04
Software Maintenance Version 276-04 includes all resolved issues and enhancements in earlier versions, and the resolved issues and enhancements in the
following tables. In the tables, for each product series:
■“Y” in a white column indicates that the resolution is available in Version 276-04 for that product series.
■“-” in a white column indicates that the issue did not apply to that product series.
■a grey-shaded column indicates that Version 276-04 was not released on that product series.
“-” in a grey column indicates that the issue did not apply to that product series.
“Y” in a grey column indicates that the issue applied to that product series. These issues are resolved in the next Version (276-05).
Level 1
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800
CR00007273 Switch 1 If a user created a configuration file that contained port trunk settings before
VLAN port settings, then a loop occurred when the switch rebooted with this
configuration.
This issue has been resolved.
-- - YYYY- - -
CR00011711 PIM v6 1 For IPv6, the router or switch could restart when PIM-SM detected that the
primary RPF interface to an (S,G) routing entry had changed because the RPF
interface had gone down. When the interface went down, PIM-SM recalculated
the RPF to the source for the (S,G) entry, and if PIM-SM only found a non-PIM
neighbour as the RPF to the source for the (S,G), the router or switch could
restart.
This issue has been resolved.
Y- YYY- - - - -

Features in 276-04 7
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CR00011994 IPsec 1 When both Software QoS and IPSec were configured on the router or switch, it
sometimes rebooted. This happened if the IPSec SA bundle was suddenly deleted
while packets were still queued in Software QoS. For example, this issue was
more likely to occur if the expirykbytes parameter of the create ipsec
bundlespecification command was configured, and the hard expiry kilobyte
limit for an IPSec SA bundle was reached quickly.
This issue has been resolved.
Y-YY---- - -
CR00012196 IPv6 1 When RIPng deleted a route from the IPv6 route table, routing for associated IPv6
flows was not updated correctly. This caused data forwarding on those flows to
use invalid routes.
This issue has been resolved.
Y- YYY- - - - -
CR00012461 IPv6 1 Sometimes the router or switch rebooted when it received Neighbour
Advertisements that did not properly conform to RFC 2461.
This issue has been resolved. The router or switch no longer reboots if it receives
non-conformant ND packets. If debugging is enabled, the router or switch now
also displays useful information about the non-conformant packets.
Y- YYY- - - - -
CR00012571
CR00013183
IPv6 1 The router or switch sometimes rebooted when running a configuration script
that included RIPng (RIPv6).
This issue has been resolved.
Y- YYY- - - - -
CR00012614 Switch 1 When PIM6 was configured on the switch, and it received an IPv6 multicast
stream for which it had no downstream interface to forward the stream to, a
reboot could occur.
This issue was resolved in a previous software version (as CR00012097) but this
version includes an improved resolution.
Y- YYY- - - - -
CR00013025 DVMRP 1 Receiving a DVMRP Graft or Prune message occasionally caused the router or
switch to reboot.
This issue has been resolved.
Y- YYY- - - - -
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800

Features in 276-04 8
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CR00013413 IP Gateway,
Load Balancer
1If the router or switch was configured with a local interface IP address and the
interface to which this address belonged did not have a logical interface with
index 0, a number of connectivity issues from this router or switch occurred, in
which the router or switch was not able to communicate with UDP, TCP or PING.
This issue has been resolved.
Y- YYYYY- - -
CR00013457 VLAN 1 When ports were added to a currently-disabled RSTP domain, the ports could
start to discard packets (because their STP state was set to Discarding).
This issue has been resolved. When ports are added to a disabled RSTP domain,
they remain in a Forwarding state.
-- - YYYY- - -
CR00013743 Switch 1 If a user created a configuration file that contained LACP settings and VLAN port
settings, then a loop occurred when the switch rebooted with this configuration.
This issue has been resolved.
-- - YYYY- - -
CR00013758 IPv6 1 If a user manually deleted a Neighbour Discovery cache entry (by using the
command delete ipv6 nd), the router or switch sometimes rebooted some time
later.
This issue has been resolved.
Y- YYY- - - - -
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800

Features in 276-04 9
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Level 2
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800
CR00009079 MLD
Snooping,
IPv6, Switch
2When MLD snooping creates an All Router group, it also (correctly) adds router
ports to other groups. However, when MLD Snooping detected that there were
no more router ports in the network, it deleted the All Router group but did not
delete the router ports from the other groups.
This issue has been resolved.
---YY-----
CR00009212 Bridge 2 The Bridge cannot be configured to bridge PPPoE packets from an Ethernet
interface that has also been configured as a PPPoE interface. Previously, such a
Bridge configuration would appear to succeed. However the Bridge would not
bridge PPPoE packets and the router would restart when the command reset
bridge was entered.
This issue has been resolved. Note: if you want to bridge PPPoE packets, do not
also configure the router as a PPPoE endpoint (by using the command create
ppp=number over=ethx-any).
Y-Y-------
CR00009213 MSTP 2 Because of an MSTP issue, the switch did not always send a BPDU with an
agreement flag to its designated bridge, even if the switch was synchronised with
the latest spanning tree information from the designated bridge. This prevented
the designated port on the designated bridge from making a fast transition to
the forwarding state. The result was that the network could take up to two times
the “forward delay” time to fully converge.
This issue has been resolved.
---YYYY---
CR00009826 IP Gateway 2 When a static ARP is deleted, the router or switch sends out an ARP request to
attempt to create a dynamic ARP for that IP address. Previously, the router or
switch did not process the ARP response correctly and therefore did not add the
ARP to its ARP table.
This issue has been resolved. When a static ARP is deleted, the router or switch
attempts to create a dynamic ARP for that IP address, and will successfully add it
to the ARP table if a device responds.
Y- YYYYY---

Features in 276-04 10
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CR00010177 Firewall 2 When a session had been initiated from the LAN side of the firewall and the SIP
ALG received a re-invite packet for that session from the WAN side, the SIP ALG
did not replace the Call ID string in the re-invite packet.
This issue has been resolved.
Y-YYY-----
CR00010513 BGP,
IP Gateway
2BGP did not update its route table when a blackhole route changed in IP.
This issue has been resolved.
Y-YYY-----
CR00010593 IPv6 2 The router sometimes forwarded packets to directly connected hosts whose
corresponding IPv6 ND cache entry was still in INCOMPLETE state. This caused it
to send the packets to incorrect MAC addresses and egress ports.
This issue has been resolved.
Y-YYY-----
CR00011120 VRRP 2 Packets transmitted from VRRP sometimes contained random VLAN tags or VLAN
Priority information.
This issue has been resolved.
Y-Y-------
CR00011175 IPv6 2 After a route’s metric and/or preference changed, the route’s position in the
Equal Cost Multi Path chain was not always updated properly. This sometimes
caused the forwarding process to select a sub-optimal route.
This issue has been resolved.
Y-YYY-----
CR00011434 File 2 The router or switch sometimes rebooted when copying a very large file (several
Mbytes). This issue has been resolved by improving the copy process so that it
uses fewer memory buffers.
Y- YYYYY---
CR Module Level Description
AR44xS/ AR450S AR7x5 AR750S Rapier i AT-8800 AT-8600 AT-8700XL AT-8948 AT-9900 AT-9800