Allied Telesis Rapier Series Manuale di istruzioni

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Patch Release Note

Patch 86253-03

For Rapier Series Switches

Introduction

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

patch 86253-03 for Software Release 2.5.3 on existing models of Rapier 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 2.5.3 for Rapier Switches and AR400 and

AR700 Series Routers (Document Number C613-10362-00 Rev A) available

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

■Rapier Switch Documentation Set for Software Release 2.5.1 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 86253-03.

Base Software Release File 86s-253.rez

Patch Release Date 30-July-2003

Compressed Patch File Name 86253-03.paz

Compressed Patch File Size 191102 bytes

2Patch Release Note

Patch 86253-03 for Software Release 2.5.3

C613-10382-00 REV B

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:

Features in 86253-03

Patch 86253-03 includes all issues resolved and enhancements released in

previous patches for Software Release 2.5.3, and the following enhancements:

When ports were added or removed as a range with the ENABLE IP IGMP

ALLGROUPS and DISABLE IP IGMP ALLGROUPS commands, port

values were interpreted as 2 separate ports. This issue has been resolved.

Features in 86253-02

Patch file details are listed in Table 2:

Patch 86253-02 includes the following enhancements and resolved issues:

It is now possible to prevent specified ports from acting as IGMP all-group

ports, and specify which ports are allowed to behave as all-group entry

ports. This is enabled with the ENABLE IP IGMP ALLGROUP command,

and disabled with the DISABLE IP IGMP ALLGROUP command.

For details, see “IGMP Snooping All-Group Entry” on page 5.

DHCP was offering network and broadcast addresses to clients. 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: 03816 Module: IPG Level: 2

Table 2: Patch file details for Patch 86253-02.

Base Software Release File 86s-253.rez

Patch Release Date 25-July-2003

Compressed Patch File Name 86253-02.paz

Compressed Patch File Size 190900 bytes

PCR: 03420 Module: IPG, SWI Level: 3

PCR: 03515 Module: DHCP Level: 3

Patch 86253-03 For Rapier Series Switches 3

Patch 86253-03 for Software Release 2.5.3

C613-10382-00 REV B

The IP route filter did not always work correctly for OSPF. This issue has

been resolved.

Executing the DISABLE SWITCH PORT command on a port that was the

source of a mirror port did not disable the mirror port. This issue has been

resolved.

A fatal error occurred if the number of DVMRP interfaces being added

exceeded the limit. This issue has been resolved.

Occasionally a fatal exception may have occurred when sending BGP

aggregate routes. This issue has been resolved.

IGMP snooping entries were not being deleted from the hardware table.

This issue has been resolved. Also, port timers are now updated when the

IGMP timeout is changed.

The output of the SHOW DVMRP FORWARDING command did not

display the forwarding ports. This issue has been resolved.

When adding a port to a VLAN, any STP ports that had been disabled in the

default STP were re-enabled. This issue has been resolved.

When the DELETE DHCP RANGE command was executed, DHCP

attempted to reclaim the addresses in that range. It also tried to reclaim

addresses in that range that were not allocated at that time, resulting in

duplicate addresses appearing on the free list for allocation. This has been

resolved by allowing DHCP to reclaim only those addresses that are

currently in use by one of its clients.

When changing from RSTP to STP mode, the STPCOMPATIBLE option for

the RSTPTYPE parameter incorrectly appeared in the dynamic

configuration. Also, when changing from RSTP to STP mode or vice versa,

disabled STP ports did not remain in the disabled state. These issues have

been resolved.

If a port went down, the port was deleted from the appropriate static IGMP

associations but was not added back again when it came back up. Similarly,

static IGMP associations were automatically deleted but not added back

when IP or IGMP was disabled. These issues have been resolved. You can

now create IGMP associations before enabling IGMP, and they will become

active when IGMP is enabled.

PCR: 03609 Module: OSPF Level: 1

PCR: 03657 Module: SWI Level: 3

PCR: 03691 Module: DVMRP Level: 2

PCR: 03692 Module: BGP Level: 2

PCR: 03696 Module: IPG Level: 2

PCR: 03698 Module: DVMRP Level: 3

PCR: 03707 Module: STP Level: 2

PCR: 03708 Module: DHCP Level: 2

PCR: 03720 Module: STP Level: 2

PCR: 03738 Module: IPG Level: 2

4Patch Release Note

Patch 86253-03 for Software Release 2.5.3

C613-10382-00 REV B

The maximum number of firewall sessions had decreased since software

release 86s-241. This issue has been resolved.

Previously, an incorrect source address was used for router advertisements

that were sent over an IPv6 tunnel. The source address of the tunnel

(specified by the IPADDRESS parameter of the ADD IPV6 TUNNEL

command) was used instead of a link local address. This caused an

interoperability problem, which has been resolved. Now, if the specified IP

address is not a link local address, then a link local address will be created

based on the IPv4 tunnel source address and used for router

advertisements.

If a ping was active and the IP configuration was reset, subsequent pings

were sent out the wrong interface. This issue has been resolved.

Executing a ping to the IP address 0.0.0.0 did not return an invalid

destination address error message. Also, when the TRACE command

was executed for local addresses, it timed out after 90 seconds. These issues

have been resolved.

The IP multicast counter did not increment when IGMP, DVMRP and PIM

packets were transmitted and received. This issue has been resolved.

The firewall denied streaming data using Windows Media Player 9. This

issue has been resolved.

The DHCP client was not honouring a subnet option provided by the DHCP

server. This issue has been resolved.

The TIMEOUT and SIZE parameters are only valid for the SET IP DNS

CACHE command, but no error message was returned if either parameter

was specified for the SET IP DNS command. This issue has been resolved.

Fragmentation of IPv6 packets now complies with RFC 2460’s requirement

to align packet sizes to 8 octets.

The DHCP server did not send a DHCPNAK message when a previously

statically assigned IP DHCP entry was again requested by a client. This

issue has been resolved.

PCR: 03741 Module: FIREWALL Level: 3

PCR: 03742 Module: IPV6 Level: 2

PCR: 03743 Module: IP Level: 3

PCR: 03744 Module: PING Level: 3

PCR: 03764 Module: IPG Level: 3

PCR: 03766 Module: FIREWALL Level: 2

PCR: 03779 Module: DHCP Level: 2

PCR: 03783 Module: IPG Level: 3

PCR: 03784 Module: IPV6 Level: 3

PCR: 03788 Module: DHCP Level: 2

Patch 86253-03 For Rapier Series Switches 5

Patch 86253-03 for Software Release 2.5.3

C613-10382-00 REV B

The ENABLE RSVP INTERFACE command did not succeed if IP was

enabled after the RSVP interface had been created. Now, ENABLE RSVP

INTERFACE will succeed regardless of when IP is enabled as long as an IP

interface exists.

When a new static entry was allocated to a client, an old dynamic entry

remained inuse for a full lease period. This issue has been resolved. The old

entry will now be reclaimed when the client attempts to renew its lease and

receives the new static entry.

IGMP Snooping All-Group Entry

Because IGMP is an IP-based protocol, multicast group membership for VLAN

aware devices is on a per-VLAN basis. If at least one port in the VLAN is a

member of a multicast group, multicast packets will be flooded onto all ports in

the VLAN by default.

IGMP snooping enables the switch to forward multicast traffic intelligently on

the switch. The switch listens to IGMP membership reports, queries and leaves

messages to identify the switch ports that are members of multicast groups.

Multicast traffic will only be forwarded to ports identified as members of the

specific multicast group.

This enhancement allows network managers to prevent specified ports from

acting as IGMP all-group ports, and specify which ports are allowed to behave

as all-group entry ports, by using the ENABLE IP IGMP ALLGROUP

command.

For example, consider a video streaming service which has 15 channels. When

the switch receives IGMP membership reports destined for the address

239.0.0.2 from an unauthorised user, all 15 channels of multicast data floods to

that port, which may affect the service of the network. In order to avoid this,

the network manager decides whether or not to allow a particular port to

behave as an IGMP all-group port, e.g. port 8. Then, whenever the above IGMP

membership report is sent, the switch will not automatically add port 8 as one

of the egress ports for any IGMP membership report group, so video streaming

will not get forwarded to disabled all-group ports selected by the network

manager.

Commands

This enhancement modifies one command:

■SHOW IP IGMP

and has two new commands:

■ENABLE IP IGMP ALLGROUP

■DISABLE IP IGMP ALLGROUP

PCR: 03793 Module: RSVP Level: 3

PCR: 03799 Module: DHCP Level: 3

6 SHOW IP IGMP Patch Release Note

Patch 86253-03 for Software Release 2.5.3

C613-10382-00 REV B

Modified Command

SHOW IP IGMP

Syntax SHOW IP IGMP [COUNTER] [INTERFACE=interface]

Description This command displays information about IGMP, and multicast group

membership for each IP interface.

This enhancement includes the line “Disabled All-groups ports” on the output

of this command, as show in Figure 1 on page 6. Ports that are disabled have a

“#” symbol next to the port number.

Figure 1: Example output from the SHOW IP IGMP command.

Examples To show information about IGMP, use the command:

SHOW IP IGMP

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