Avaya P580, P550R, P880 manual Example

Page 21

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

610-0184-095

June 14, 2001

21

Image 21
Contents Overview Cajun P550R/P580/P880/P882 Switch Release NotesNew Hardware and Software Features Software FeaturesHardware June 14 Queue Classification and Servicing Features Supported Product Binaries and Boot CodesType of Switch Binary File Boot File OverviewClassification of Traffic WFQ Queue-Servicing Algorithm Port Mirroring on 80-Series ModulesSetting Up Port Mirroring Configuring Port Mirroring By Using the CLIPort Ranges for 80-Series Port Mirroring Port Ranges for 80-Series Port Mirroring Config# clear port mirror fabricmode2 channel channel If you select Then Configuring Port Mirroring By Using the Web AgentEnabling Option 82 for Dhcp Changing the Status of Option 82 by Using the Web AgentChanging the Status of Option 82 by Using Snmp Changing the Status of Option 82 by Using the CLIMIB Item Cjnipv4serv.mibEnabling MAC Address Lock and Traps by Using the Web Agent Enabling MAC Address Lock and Traps by Using the CLIEnabling Traps for Unknown Source Addresses ProminetMib.txt, version Enabling MAC Address Lock and Traps by Using SnmpProminetMib.txt MIB, MIB Items, and OIDs for MAC Address LockChanged CLI Commands Corrected ProblemsEnhancements Command Line Interface CLI Known Problems and WorkaroundsATM Uplink Modules Flood Rate LimitingDesired Rate Web or CLI Setting Frames Transmitted with Cyclic Redundancy Check CRC ErrorsHot Swap Modules Igmp Group Membership TableIntelligent Multicasting Example L3 Forwarding Cache IPXPoint-to-Point Protocol PPP and Telnet Option 82 for DchpSeries Modules Port MirroringRedundant Switch Controller Remote Monitoring RmonSimple Network-Management Protocol Snmp Downloading the Startup Configuration File P580/P882 Chassis SlotSupervisor Module Following error message in the CLI Switch PortsWeb AFT Issues Vlan IssuesFunctional Restrictions Auto-NegotiationCajunView Checksum Error MessageCPU Synchronization Legacy CLIDistance Vector Multicast Routing Protocol Dvmrp Hunt GroupsLink Status Loopback Tests NetscapeOversized Packets Software License Keying Redundant Controller SupportSpanning Tree Protocol STP 3Com TaggingTftp Download Status Delay Documentation Updates and CorrectionsCajun P550R/P880/P882 Switch User Guide Web AgentClick Interfaces Technical SupportCommand Setting the Priority of a PortExamples Setting a Port to Ignore Tag PriorityDisplaying the Port Settings Setting a Rule in an Access Control List June 14 Displaying Access Control Lists Setting WFQ Correct syntax for Command 2 is Displaying the Queue Service Settings