Troubleshooting Multicast

Overview The aim of this article is to highlight common issues related to multicast bridging and routing and the troubleshooting steps that can be followed to identify the same. Preliminary Checks Before moving onto the scenarios discussed in this article, here are a few preliminary checks that should be performed. 1) Inspect the contents of the multicast feed: (i)  Is the corresponding destination MAC address (DMAC) for the concerned multicast group correct? 08:28:45.321122 44:4c:a8:8d:fa:c5 > 01:00:5e:7f:3d:4c, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 46) > UDP,...
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Set TTL for PBRed packets

Description: The feature allows modification of the egress TTL of packets routed via PBR. It allows to modify the TTL of naked IP/IPv6 packet and the TTL of inner header for tunneled packet . The TTL action will be effective only when it is configured along with a set nexthop or nexthop-group action and the nexthop/nexthop-group is resolved and PMF profile is “tc-counters”. Supported Platforms: DCS7500R DCS7500R2 DCS7280R DCS7280R2 Configuration: Enable tc-counters Pmf profile: (config)#hardware tcam (config-hw-tcam)#system profile tc-counters (config-hw-tcam)#exit (config) Create a class-map: (config)#class type pbr match-any className (config-cmap-pbr-className)#match ip access-group aclName (config-cmap-pbr-className)#exit (config)# Create a policy-map: (config)#policy-map type...
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