Allied Telesis Patch 89262-08 Manuale di istruzioni

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Patch Release Note

Patch 89262-08

For AT-8900 Series Switches

Introduction

This patch release note lists the issues addressed and enhancements made in

patch 89262-08 for Software Release 2.6.2 on existing models of AT-8900 Series

switches. Patch file details are listed in Table 1.

This release note should be read in conjunction with the following documents:

■Release Note: Software Release 2.6.2 for AT-8900 Series switches

(Document Number C613-10399-00 REV A) available from

www.alliedtelesyn.co.nz/documentation/documentation.html.

■AT-8900 Series Switch Documentation Set for Software Release 2.6.2

available on the Documentation and Tools CD-ROM packaged with your

switch, or from www.alliedtelesyn.co.nz/documentation/documentation.html.

WARNING: Using a patch for a different model or software release may cause

unpredictable results, including disruption to the network. Information in this

release note is subject to change without notice and does not represent a

commitment on the part of Allied Telesyn International. While every effort has

been made to ensure that the information contained within this document and

the features and changes described are accurate, Allied Telesyn International

can not accept any type of liability for errors in, or omissions arising from the

use of this information.

Table 1: Patch file details for Patch 89262-08.

Base Software Release File 89-262.rez

Patch Release Date 15-Oct-2004

Compressed Patch File Name 89262-08.paz

Compressed Patch File Size 324452 bytes

2Patch Release Note

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

Some of the issues addressed in this Release Note include a level number. This

number reflects the importance of the issue that has been resolved. The levels

are:

From Patch 89262-07 onwards, issues for each patch are listed in severity order as per

the levels above. Enhancement PCRs are listed after Level 4 issues.

Features in 89262-08

Patch 89262-08 includes all issues resolved and enhancements released in

previous patches for Software Release 2.6.2, and the following enhancements:

Level 1

No issues.

Level 2

IPv6 multicast packets were not being forwarded when coming from a

6-over-4 tunnel. This issue has been resolved.

If the log module was configured to store a very large number of messages

(for example, more than 3000 messages), a watchdog timeout could occur

when the show debug command was executed. This issue has been

resolved.

Please note that this problem would not occur when the show log command

was executed. A temporary work-around would be to disable the log

module before executing the show debug command.

In a multicast setup, there was a possibility that all multicast and broadcast

packets were not being forwarded as expected. This caused symptoms such

as RIPv1 or RIPv2 losing routes, PIM neighbourhoods being lost, and other

protocols using broadcast or multicast packets would fail to register any

peers/neighbours. Also, multicast packets are not switched. This issue has

been resolved.

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.

PCR: 40570 Module: IP6 Level: 2

PCR: 40573 Module: LOG Level: 2

PCR: 40591 Module: SWMX Level: 2

Patch 89262-08 For AT-8900 Series Switches 3

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

When STP is enabled, when frames with a multicast destination MAC

address were sent, a loop was observed within the network. This issue has

been resolved.

In network configurations with multiple paths to neighbours on an

interface, if the interface changed state from up to down, then up again, the

interface route may have been erroneously deleted by a route update. This

issue has been resolved.

The valid and preferred parameters were incorrectly added to the dynamic

set ipv6 prefix configuration. The default onlink and autonomous

parameters were also being included. This issue has been resolved.

Level 3

The counter parameter did not exist in the show igmpsnooping command.

This issue has been resolved.

An error message is now shown if the user tries to assign more than the

allowable number of traffic class (or default traffic class) entries to active

QOS policies.

When a Core port was added to a nested VLAN, its Ingress Filtering

attribute was set to be On and Acceptable Frame Type was set to be Admit

Only VLAN tagged Frames. If the port was deleted from that VLAN, its

Ingress Filtering attribute must be set to Off and Acceptable Frame Type

must be set to Admit All Frames, however, the attributes were not changed

when the port was deleted from the nested VLAN. This issue has been

resolved.

The manager prompt did not appear when using a telnet session until the

[Enter] key was pressed several times. This issue has been resolved.

An FTP server located on a private interface of a firewall with NAT enabled

may have had its ftp-data (tcp/20) source port translated to another port.

This could lead to a firewall rejecting the data packets, as they do not strictly

conform to RFC 959. This issue has been resolved, ensuring that ftp-data

packets are sent from port 20 on the firewall, even when NAT is enabled.

PCR: 40596 Module: SWMX Level: 2

PCR: 40601 Module: SWMX Level: 2

PCR: 40619 Module: IPG Level: 2

PCR: 40589 Module: IPG Level: 3

PCR: 40603 Module: SWI, SWMX Level: 3

PCR: 40606 Module: VLAN Level: 3

PCR: 40617 Module: TTY Level: 3

PCR: 40618 Module: SWI Level: 3

4Patch Release Note

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

Fixing speed on a fibre SPF to 1000mfull in a configuration script showed

up incorrectly as 10mfull actual speed after reboot. This issue has been

resolved.

Level 4

No issues.

Enhancements

No issues.

Features in 89262-07

Patch file details are listed in Table 1.

Patch 89262-07 includes all issues resolved and enhancements released in

previous patches for Software Release 2.6.2, and the following enhancements:

Level 1

No issues.

Level 2

The switch learned an ARP entry for an IP address that was already

configured on one of its interfaces. This issue has been resolved, and the

receipt of spoofed ARP packets will now generate a log message.

1) A switch reboot could be observed if an IP interface was deleted while

BGP was learning routes.

2) A switch reboot could be observed if a BGP peer was disconnected while

the other peer was learning routes.

3) Excessive log messages were generated when the switch was low on

memory.

PCR: 40618 Module: SWI Level: 3

Table 2: Patch file details for Patch 89262-07.

Base Software Release File 89-262.rez

Patch Release Date 29-Sept-2004

Compressed Patch File Name 89262-07.paz

Compressed Patch File Size 316588 bytes

PCR: 40272 Module: IPG Level: 2

PCR: 40356 Module: BGP Level: 2

Patch 89262-08 For AT-8900 Series Switches 5

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

4) Not all routes were removed from the BGP route table when a peer was

disabled.

These issues have all been resolved.

If OSPF was configured using the command set ospf dyninterface=stub, to

advertise dynamic interfaces such as PPPoE interfaces as stub links, the

links were not being advertised as expected. This issue has been resolved.

In some circumstances, when a BGP peer became physically disconnected,

subsequent deletion of routes could cause a switch reboot to occur.

If OSPF was configured using the command set ospf dyninterface=stub, to

advertise dynamic interfaces such as PPPoE interfaces as stub links, the

links were not being advertised as expected. This issue has been resolved.

In some circumstances, when a BGP peer became physically disconnected,

subsequent deletion of routes could cause a switch reboot to occur.

If an STP disabled port was moved from one VLAN to another, it caused

STP to reconverge. This issue has been resolved.

Incorrect behaviour would occur if the switch was configured with a

hardware filter that used a classifier matching on a VLAN, plus some

additional IP Layer 3 or Layer 4 information (e.g. UDPDPort); and another

filter using a classifier matching on just a VLAN. The result would be that

only non-IP packets would be matched by this second hardware filter. IP

packets not matching the first filter would not match the second, and

therefore would not be classified by the switch. This symptom could also

occur for classifiers using MACSA and MACDA. This issue has been

resolved.

The switch could reboot when a user changed the Rendezvous Point

Candidate (RPC) priority in the PIM6 module. This issue has been resolved.

When BGP redistributed routes, locally imported routes were selected

rather than peer learnt routes. This issue has been resolved.

PCR: 40419 Module: OSPF, IPG Level: 2

PCR: 40420 Module: BGP, IGP Level: 2

PCR: 40419 Module: OSPF, IPG Level: 2

PCR: 40420 Module: BGP, IGP Level: 2

PCR: 40457 Module: STP Level: 2

PCR: 40460 Module: SWMX Level: 2

PCR: 40465 Module: PIM6, PIM4 Level: 2

PCR: 40470 Module: BGP Level: 2

6Patch Release Note

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

When IP filters are configured on IP interfaces of the switch, all IP routing

must occur in software. To achieve this, the IP forwarding table in the ASIC

must be emptied. There was an issue whereby Interim IP route entries (IP

routes for which there is not yet an ARP entry for the nexthop address) were

not removed from the hardware IP forwarding table when an IP filter was

added to an IP interface. This issue has been resolved.

If the switch received many packets to Layer 3 route, but did not have ARP

entries for the destination address, the switch memory would deplete,

leading to a switch reboot. This issue has been resolved.

For OSPF-originated routes, it was possible for a route to be deleted from

the IP routing table, but still be referenced by OSPF. This could cause a

switch reboot when later generating a summary LSA that contained the old

route. This occurred using the reset ip command. This issue has been

resolved.

If the configuration script on the switch contained several commands for

creating static arp entries, the switch could reboot on startup. This issue has

been resolved.

A memory leak could occur when the accessing of the environmental

monitoring chip failed. This issue has been resolved.

When a BGP peer was physically disconnected, the best routes for all

prefixes learned were written to the silicon. The memory that was used to

contain these routes was sometimes not freed, resulting in a memory leak.

This issue has been resolved.

When DHCP is enabled, it reclaims IP addresses at switch startup to

determine if the addresses are in use or not. If, during this process, DHCP

was disabled then re-enabled, the switch would not attempt to reclaim the

remaining IP address ranges. This would lead to the rejection of DHCP

requests for IP addresses that were still being reclaimed. This issue has been

resolved.

When doing AS-Path regular expression matching in the show bgp route

command, the router could reboot if there were withdrawn routes in the

BGP table. This issue has been resolved.

PCR: 40473 Module: IPG Level: 2

PCR: 40478 Module: IPG Level: 2

PCR: 40479 Module: OSPF Level: 2

PCR: 40481 Module: IPG Level: 2

PCR: 40487 Module: CORE Level: 2

PCR: 40488 Module: IPG Level: 2

PCR: 40496 Module: DHCP Level: 2

PCR: 40500 Module: BGP Level: 2

Patch 89262-08 For AT-8900 Series Switches 7

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

A configuration generated with the create config or show config dynamic

commands could under some circumstances, include a

disable vrrp = <vrrpid> command even if VRRP was enabled. This issue

has been resolved.

While initialising a range, the switch acting as a DHCP server may release

a dynamic entry incorrectly. This issue has been resolved.

When the STP mode was changed, all the static arps on the ports belonging

to the STP were deleted. This issue has been resolved.

Multicast data could not flow from PIM to DVMRP on a PIM/DVMRP

border switch. This issue has been resolved.

If a create classifier command contained the ethformat parameter, the

resulting entry in a script created using the create config, or show config

dynamic commands could sometimes be incorrect. This issue has been

resolved.

When both Load Balancer and Firewall were configured, the very first TCP

session was established after rebooting. Subsequent TCP session startup

packets may have been routed out to an incorrect interface causing sessions

to not be established. This issue has been resolved.

A customer port in one nested VLAN could be set to be a core port in

another nested VLAN. This issue has been resolved.

When a particular model of SFP is fitted, and a switch reboot occurs, the

switch could get locked in a reboot cycle, and never manage to finish

booting. This issue has been resolved.

When the status of an interface changed, the BGP revaluation of IP routes

for redistribution (via the add bgp import or add bgp network commands)

was incorrect. This gave inconsistent BGP route tables depending on the

order of events. This issue has been resolved.

Multicast data failed to be forwarded by PIM-SM if an MLD report was

received on the switch before the corresponding multicast stream had

arrived. This issue has been resolved.

PCR: 40510 Module: VRRP Level: 2

PCR: 40516 Module: DHCP Level: 2

PCR: 40519 Module: SWI Level: 2

PCR: 40520 Module: DVMRP Level: 2

PCR: 40522 Module: CLASSIFIER Level: 2

PCR: 40530 Module: IPG Level: 2

PCR: 40531 Module: VLAN Level: 2

PCR: 40535 Module: SWMX Level: 2

PCR: 40537 Module: BGP Level: 2

PCR: 40538 Module: IP6, SWI Level: 2

8Patch Release Note

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

Problems could occur if hardware filters or QOS policies were created using

a classifier matching on: a Layer 2 attribute other than MAC Destination

(e.g. MACSA or VLAN ID), and one or more other parameters that match

on IPv4 frames (e.g. IP address, UDP/TCP parameters), and another

classifier matching on Layer 2 attributes only.

The possible problems were; a generic Layer 2 match only succeeding if the

frame was not of IP type, or false-positive matches when a frames had the

same MAC Destination as a classifier designed to match on MAC Source

address. This issue has been resolved.

If a classifier was created that used the ethformat and protocol parameters,

the resulting entry in a script created using the create config command or

show config dynamic commands was not always correct. This issue has

been resolved.

When a Novell IPX packet was received by a port in a a protocol-based

VLAN, it was being flooded out all ports on the default VLAN. This issue

has been resolved.

1.) A port was remaining in the default VLAN after having been added to

a nested VLAN.

2.) A port was being returned to the default VLAN when deleted from one

nested VLAN even if it was still a member of another nested VLAN.

3.) A port associated with a protocol or subnet rule was not being returned

to the default VLAN when deleted from a nested VLAN.

These issues have all been resolved.

The receipt of two IP packets whose destination IP addresses were subnet

addresses caused the switch to reboot. This issue has been resolved.

Wrong bits were being set in the ASIC rule table for classifiers that matched

on IPX source socket. As the result, the classifiers would match on incorrect

values of IPX source socket. This issue has been resolved.

Some MIB values for the AT-QOS MIB, have been changed so that the

output of the switch is now compatible with the latest version of the MIB.

After the disable switch learn command had been executed successfully,

automatic MAC learning was still operating. This issue has been resolved.

PCR: 40540 Module: SWI Level: 2

PCR: 40541 Module: CLASSIFIER Level: 2

PCR: 40543 Module: SWMX Level: 2

PCR: 40544 Module: VLAN Level: 2

PCR: 40549 Module: SWI Level: 2

PCR: 40550 Module: SWMX Level: 2

PCR: 40554 Module: QoS Level: 2

PCR: 40561 Module: SWMX Level: 2

Patch 89262-08 For AT-8900 Series Switches 9

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

If the command enable switch accelerator function=icmpredirect had been

executed, there was no resulting entry in a script subsequently created by

the create config or show config dynamic commands. This issue has been

resolved.

If two protocol VLAN association rules were added to two different

VLANs, the second protocol association rule would not work. This issue has

been resolved.

When PIM or DVMRP was enabled, if IP multicast packets were received on

the non-RPF (Reverse-Path-Forwarding) interface, i.e. the wrong ingress

interface, the CPU could become highly utilised, and the packets were not

correctly Layer 2 switched. This issue has been resolved.

Adding, or deleting, port=42 to, or from, a VLAN could cause the entire

Layer 2 Multicast Table to be cleared. This would subsequently cause high

CPU utilisation under heavy multicast traffic. This issue has been resolved.

If VRRP had been enabled on the switch, then the routing of any packets

that entered the switch via a an interface on which VRRP was operating

would be performed in software, rather than using the L3 switching process

in the ASIC. This issue has been resolved.

If a timed-out ARP entry was renewed by BOOTP, the new entry be created

with no port association. This issue has been resolved.

Level 3

When an accelerator card is installed, and ports had been configured for

mirroring, the enable switch mirror caused an unnecessary warning

message to be displayed. This issue has been resolved.

When an accelerator card is installed, the set switch mirror command

caused the switch to display an incorrect message saying that the maximum

port number is 54. This issue has been resolved.

In certain scenarios when acting as a DHCP server, the switch would send

a DHCP ACK to an invalid MAC address. This issue has been resolved.

PCR: 40562 Module: SWNP Level: 2

PCR: 40565 Module: SWMX Level: 2

PCR: 40571 Module: SWMX Level: 2

PCR: 40574 Module: SWMX Level: 2

PCR: 40586 Module: SWMX Level: 2

PCR: 40592 Module: BOOTP Level: 2

PCR: 40471 Module: SWI Level: 3

PCR: 40474 Module: IPG Level: 3

PCR: 40493 Module: DHCP Level: 3

10 Patch Release Note

Patch 89262-08 for Software Release 2.6.2

C613-10402-00 REV H

When a virtual link end point is no longer reachable, the virtual interface is

not brought down, and the virtual neighbour is not removed. This issue has

been resolved.

Setting switch enhanced mode to “none” in order to disable QoS counters

did not disable the QoS counters properly. A debug error message was

shown when attempting to view the traffic class counters. This debug error

message has now been removed and an appropriate error message is now

displayed.

When MIB counters relating to packet flows reached their maximum

possible value (0xFFFFFFFF), they should have returned to 0, and counted

up from 0 again. However, they were remaining stuck at 0xFFFFFFFF.

This issue has been resolved, so that the counters will correctly roll over

from 0xFFFFFFFF to 0 and start counting up again.

Level 4

No issues.

Enhancements

The RSTP module has been enhanced to detect simple loop scenarios

downstream of an RSTP enabled edge port. If a loop is detected, the port is

placed into a Backup/Discarding/LoopbackDisabled state. In this state, all

packets are discarded. The port transitions to a Designated/Discarding

state after 3 x helloPeriod. If the loop still exists, the Backup/Discarding/

LoopbackDisabled state is repeated.

The new command show tacplus has been added. This command shows the

module status, number of servers, and number of logged in users.

PCR: 40498 Module: OSPF Level: 3

PCR: 40515 Module: QoS Level: 3

PCR: 40525 Module: SWI, SWX Level: 3

PCR: 40511 Module: RSTP

PCR: 40521 Module: TACACS+

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