Allied Telesis AT-9800 Series Manuale di istruzioni

Software Maintenance Release Note

Release sb273-01

For SwitchBlade 4000 Series Switches and

AT-9800 Series Switches

Introduction

This software maintenance release note lists the issues addressed, and

enhancements made, in patch SB273-01 for Software Release 2.7.3 on existing

models of the SwitchBlade and AT-9800 series switches. Release file details are

listed in Table 1.

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

■SwitchBlade document Set for Software Release 2.7.3 (Document Number

C613-03100-00 REV A).

■AT-9800 Series Switches Documentation Set for Software Release 2.7.3

(Document Number C613-03101-00 REV A).

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: Release file details for release SB273-01.

Base Software Release File SB-273.rez

Maintenance Release Date April 22 2005

Compressed Release File Name SB262-01.rez

Compressed Release File Size 91,532 bytes

2 Enabling and installing this Release Software Maintenance Release Note

Release sb273-01

C613-10436-00 Rev A

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:

Enabling and installing this Release

To use this maintenance release you must have a base release license for

Software Release 2.7.3. Contact your distributor or reseller for more

information.

To enable this release and install it as the preferred release, use the commands:

enable rel=sb273-01.rez num=2.7.3

set install=pref rel=sb273-01.rez

Features in sb273-01

sb273-01.rez includes the following issues resolved and enhancements

released:

Level 1

A heavy processor load could lead to queuing RSTP BPDUs, which in turn

could lead to even more processor load, resulting in more queued BPDUs.

This issue has been resolved by improving the efficiency in the interaction

between RSTP TCN BPDUs and the hardware tables.

This issue has been resolved. (PCR number: 40672)

When failover occurred between a redundant pair of Load Balancing

devices, host ARP caches were not updated with the new Master's MAC

address, thus causing the hosts to lose connectivity until their ARP caches

timed out the stale entry. This issue has been resolved. (No PCR number.)

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.

CR00005227 Module: SWI, RSTP, SWMX,

SWCX, SW56

Level: 1

CR00006609 Module: LB Level: 1

Release sb273-01 3

Release sb273-01

C613-10436-00 Rev A

A reboot could occur while ageing out Firewall sessions when the device

was under heavy load and had many active Firewall sessions.

This issue has been resolved. (No PCR number.)

When either the Firewall was enabled or multiple L2TP tunnels were

configured, and a default route existed over an L2TP tunnel, it was possible

for an infinite internal packet loop to be created when a packet was sent

over the L2TP tunnel after the underlying interface route to the remote IP

had gone down. This caused a reboot to occur.

This issue has been resolved. (No PCR number.)

Level 2

Previously, the forwarding database was flushed instead of being aged out

when an STP topology change notification was received.

This issue has been resolved. (PCR number: 40185)

Previously, when a port or ports was moved from one VLAN to another, the

switch would reset both STP/RSTP instances that control the VLANs. This

behaviour is now changed to only reset the STP process on the STP instance

that the port(s) is joining. The switch will now also retain the port(s) edge-

port setting during the moving process.

This issue has been resolved.

When routers and switches were using CIDR addressing, with a unicast

address coinciding with a network broadcast address of class A, B, or C,

then they could incorrectly forward traffic as directed broadcasts, even

though the traffic was unicast (only).

This issue has been resolved. (PCR number: 50069)

When Cisco encapsulation was used on a frame relay interface, the router

was not recognising bridged packets. This issue has been resolved.

Also, specifying a logical frame relay interface when adding a bridge port

has been explicitly disallowed. (No PCR number.)

CR00007034 Module: Firewall Level: 1

CR00007695 Module: PPP Level: 1

CR00002290 Module: STP, SWI Level: 2

CR00002662 Module: STP Level: 2

CR00007341 Module: IPG Level: 2

CR00007358 Module: BRG, FR Level: 2

4 Features in sb273-01 Software Maintenance Release Note

Release sb273-01

C613-10436-00 Rev A

Previously, when the packet overhead limits were exceeded, some packets

were being silently dropped by SQoS.

This issue has been resolved.

Additionally, extra checking has been added to the ATM process so that it

will explicitly drop, and count, any packets that still exceed the overhead

limit. This will aid in the diagnosing of any other cases where packets are

being dropped. (No PCR number.)

The AR026 4-port Ethernet PIC was not capable of receiving 1519-1522 byte

VLAN-tagged packets. Instead, these packets were dropped because they

were considered too long.

Also, some early revisions of the AR720 and AR740 were not capable of

receiving 1519-1522 byte VLAN-tagged packets.

These issues have been resolved. (PCR number: 50065)

When the router was acting as an L2TP Access Concentrator (LAC) it would

fail to negotiate a Virtual tunnel to another vendor’s LNS. This was due to

invalid Proxy LCP AVPs being used within the ICCN message.

This issue has been resolved. (No PCR number.)

On 9800 series switches with GBICs installed, if a GBIC with an active link

was physically removed the interface would not go DOWN.

This issue has been resolved. (No PCR number.)

When hot-swapping a Switch Blade line card, the trunking information on

other line cards could get over-written and cause the switch to stop

forwarding traffic.

This issue has been resolved. (No PCR number.)

Level 3

IP interfaces over X25 were not operating correctly. This issue has been

resolved. (No PCR number.)

The DNS relay has been changed to allow the relay of resource record types

between 0x1d and 0xff. Previously packets with these types of resource

records were dropped.

This issue has been resolved (No PCR number.)

CR00007417 Module: ATM,ENCO Level: 2

CR00007428 Module: ETH Level: 2

CR00007436 Module: L2TP Level: 2

CR00007770 Module: SWI Level: 2

CR00008127 Module: SWI Level: 2

CR00006086 Module: x25t Level: 3

CR00007476 Module: IPG Level: 3

Release sb273-01 5

Release sb273-01

C613-10436-00 Rev A

DVMRP packets were being dropped due to packet length inconsistencies

from other vendor devices.

This issue has been resolved. (No PCR number.)

If ATM is receiving a OAM loopback cell (normal from an ISP) at regular

intervals then it may cause a reboot. This fix stops this behaviour and will

also stop some other random packet corruption.

This issue has been resolved. (PCR number: 50064)

Previously, when changing the password on a log output/receive definition

to a shorter string, the log message exchange could fail.

This issue has been resolved. (PCR number: 50070)

When changing VLAN configuration on the Switchblade, MAC addresses

on the ports that move to a new VLAN need to be deleted. This address

deletion process has been made significantly more efficient, minimising the

impact on general switch operation.

This issue has been resolved. (No PCR number.)

Level 4

There was not enough information displayed to the user when the

ACTIVATE FLASH COMPACTION command was entered at the same time

as Flash was compacting.

This issue has been resolved. (No PCR number.)

Enhancements

Previously ISAKMP NAT-T was enabled by default on every ISAKMP

policy created. NAT-T is now disabled by default on every ISAKMP policy.

(No PCR number.)

The ability to configure Van Jacobson Header Compression over dynamic

PPP interfaces has been added. To this end, the command parameter

'VJC={ON|OFF}' has been added to the CREATE and SET PPP TEMPLATE

commands. (No PCR number.)

CR00007521 Module: IPG Level: 3

CR00007686 Module: ATM Level: 3

CR00007716 Module: LOG Level: 3

CR00007760 Module: SWCX, SWITCH Level: 3

CR00006093 Module: FFS Level: 4

CR00006652 Module: IKMP, IPSEC

CR00006953 Module: PPP

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