Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide ...

8MSDPCommon diagnostic scenarios• Multicast is not working.VLANs and route-only will not work together. Removing the route-only setting eliminates theproblem.• Multicast packets are not being transferred between two Brocade MLX series devices.The two Brocade MLX series devices have network address overlap. The problem is resolvedwhen the network address of one of the devices is changed.MSDPThe Multicast Source Discovery Protocol (MSDP) is used by Protocol-Independent Multicast (PIM)Sparse routers to exchange routing information for PIM Sparse multicast groups across PIM Sparsedomains. Routers running MSDP can discover PIM Sparse sources that are in other PIM Sparsedomains.MSDP show commandsYou can display the following MSDP information using show commands:• Summary information – The IP addresses of the peers, the state of the Brocade device’s MSDPsession with each peer, and statistics for Keepalive, Source Active, and Notification messagessent to and received from each of the peers.• Peer information – The IP address of the peer, along with detailed MSDP and TCP statistics.• Source Active cache entries – The Source Active messages cached by the router.show ip msdp summarySyntax: show ip msdp summaryThis command displays summary MSDP information, as shown in the following example.Brocade# show ip msdp summaryMSDP Peer Status SummaryKA: Keepalive SA:Source-Active NOT: NotificationPeer Address State KA SA NOTIn Out In Out In Out206.251.17.30 ESTABLISH 3 3 0 640 0 0206.251.17.41 ESTABLISH 0 3 651 0 0 0show ip msdp peerSyntax: show ip msdp peerThis command displays MSDP peer information, as shown in the following example.284 Brocade MLX Series and Brocade NetIron XMR Diagnostic Guide53-1002426-02