Avaya P550R, P580, P880 Workaround:

21

610-0184-095 June 14, 2001

Example:

The unicast routing protocol in use on all connected routers is OSPF,

and all ports are on the same VLAN. An endstation joins the IP

multicast group 226.128.0.5 on port 1. The MAC address for the

group is 01:00:5E:00:00:05. IGMP snooping creates a session for this

MAC address, with port 1 as the client port. There is a non-multicast

OSPF router attached to port 2. OSPF uses the IP multicast

link scoped group 224.0.0.5, which also maps to a MAC address of

01:00:5E:00:00:05. Because port 2 is not considered a router port,

and it is not part of the 01:00:5E:00:00:05 session, the switch only

passes OSPF messages out port 1. Other protocols, such as the

Service Location Protocol (RFC 2608), use 224.0.1.22 and

224.0.1.35, which can be blocked by endstations joining sessions

that map to the same MAC address.

Note: This is the same problem that is discussed in the Microsoft

Product Support Article Q223136 that can be found at:

http://support.microsoft.com/support/kb/articles/Q223/1/ 36.asp

involving RRAS setup. This specific issue, however, should not break

routing protocols as suggested in this article because the Cajun

switch ignores joins for local multicast groups (224.0.0.x).

Workaround: Check that all ports that are connected to the router are configured

as router ports. This prevents all router-to-router messages from

being blocked.

If other non-router protocols, such as the Server Location Service,

are in use, create static sessions as needed. Do not create static

sessions that conflict with the protocols used on your network.

Refer to the following web site for a complete list of internet

multicast addresses recognized by the IANA:

http://www.isi.edu/in-notes/iana/assignments/ multicast-addresses

Note: Enable is the default state for “Rate Limiting” on 10/100

Mbps ports. Multicast traffic and broadcast traffic is rate-limited (to

20%) on 10/100 Mbps ports.

Multicast traffic is rate-limited unless Intelligent Multicasting is

enabled. Multicast traffic for which the Intelligent Multicast session

was created is not subject to rate limiting unless the rate limiting

Contents

Main Cajun P550R/P580/P880/P882 Switch Release Notes v5.2.2 Overview http://www.avayanetwork.com/ New Hardware and Software Features Hardware Software Features Page Supported Product Binaries and Boot Codes Queue Classification and Servicing Features Overview Classification of Traffic WFQ Queue-Servicing Algorithm Port Mirroring on 80-Series Modules Configuring Port Mirroring By Using the CLI Setting Up Port Table 2. Port Ranges for 80-Series Port Mirroring Page Removing Port Viewing Information about Port Configuring Port Mirroring By Using the Web Agent Setting Up Port Removing Port Viewing Information about Port Mirroring Enabling Option 82 for DHCP Changing the Status of Option 82 by Using the Web Agent Changing the Status of Option 82 by Using the CLI Changing the Status of Option 82 by Using SNMP Enabling Traps for Unknown Source Addresses Enabling MAC Address Lock and Traps by Using the Web Agent Enabling MAC Address Lock and Traps by Using the CLI Enabling MAC Address Lock and Traps by Using SNMP Page Enhancements Changed CLI Commands Corrected Problems Known Problems and Workarounds ARP Problem: Workaround: ATM Uplink Modules Frames Transmitted with Cyclic Redundancy Check (CRC) Errors Problem: Workaround: Hot Swap Modules IGMP Group Membership Table Problem: Workaround: Intelligent Multicasting Workaround: IP IPX Problem: Workaround: L3 Forwarding Cache Option 82 for DCHP PCMCIA Problem: Workaround: Point-to-Point Protocol (PPP) and Telnet Port Mirroring 80-Series Modules Problem: Workaround: Problem: Redundant Switch Controller Remote Monitoring (RMON) Workaround: Simple Network-Management Protocol (SNMP) Problem: P580/P882 Chassis Slot 2 Downloading the Startup Configuration File Problem: Workaround: Supervisor Module Switch Ports Problem: Workaround: RIP Problem: Functional Restrictions Auto-Negotiation Workaround: Checksum Error Message Problem: Workaround: CajunView v3.0 CPU Synchronization Distance Vector Multicast Routing Protocol (DVMRP) IEEE 802.1Q Packets Problem: Workaround: Hunt Groups Loopback Tests Netscape 6.0 Oversized Packets PCMCIA Port Mirroring Page TFTP Download Status Delay VLAN Issues Web Agent Problem: Documentation Updates and Corrections Cajun P550R/P880/P882 Switch User Guide Technical Support Appendix A: CLI Commands for Queue Classification and Servicing Overview Setting the Priority of a Port Setting a Port to Ignore Tag Priority Displaying the Port Settings Setting a Rule in an Access Control List Page Displaying Access Control Lists Setting WFQ Overview Command 1 Command 2 Displaying the Queue Service Settings