24Patch Release Note
PCR: 02527 Module: TCPNetwork affecting: No
TCP did not send a TCP Reset message under some circumstances, for example when the Telnet server was disabled. This issue has been resolved.
PCR: 02552 Module: SWINetwork affecting: No
If ingress filtering was supported within trunk groups, ports with ingress filtering enabled were erroneously added to the trunk group. This issue has been resolved.
PCR: 02574 Module: DVMRPNetwork affecting: No
Some change actions, and the resending of prune messages were not operating correctly. This issue has been resolved.
PCR: 02581 Module: TMNetwork affecting: No
The test facility was not testing switch ports. This issue has been resolved.
Availability
Patches can be downloaded from the Software Updates area of the Allied Telesyn web site at www.alliedtelesyn.co.nz/support/updates/patches.html. A licence or password is not required to use a patch.
Static IGMP
This section describes an enhancement to the Internet Group Management
Protocol (IGMP), which is supplied as a patch on Software Releases 2.5.1 for
Rapier i Series switches.
It is possible to have a network segment that either has no multicast group members, or has a host that is unable to report its group membership with IGMP. In such cases, no multicast traffic is sent to the network segment. This enhancement provides a mechanism for the user to pull down multicast traffic to the segment.
Currently the switch forwards multicast data on a dynamic basis to hosts who have joined the multicast group. This enhancement allows the user to instruct the switch to forward multicast data over a specified interface and port, as shown in Figure 2 on page 25. This capability is essential for sending multicast traffic to hosts that cannot report their group membership with IGMP. It plays an important role in video over ADSL applications.
Figure 2 on page 25 illustrates a switch forwarding the multicast stream to a set-top box after a user specifies that group 224.1.1.1 multicast data should be forwarded out of port 4 of VLAN1.
Unlike conventional IGMP membership, this user-specified static membership never times out.
The user will also be able to filter some IGMP debug messages by source IP address and group destination address.
Patch
