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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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Using Tracert to Check Multicast Service Performance

Using Tracert to Check Multicast Service Performance

Context

During multicast service troubleshooting and routine maintenance, run the mtrace command to collect traffic information, which helps you locate the failure points and reduce configuration errors. You can also perform tracert tests multiple times to figure out rates of multicast flows.

Before running the mtrace command, run the mtrace query-policy command to filter the unicast Internet Group Management Protocol (IGMP) Tracert Query packets.

Procedure

  • Run the mtrace [ -l [ stat-times ] [ -st stat-int ] | -m max-ttl | [ -mr | -ur resp-dest ] | -q nqueries | -tr ttl | -ts ttl | -v | -vpn-instance vpn-instance-name | -w timeout ] * source source-address command to trace the reverse path forwarding (RPF) path from a multicast source to the querier.
  • Run the mtrace -g group [ -l [ stat-times ] [ -st stat-int ] | -m max-ttl | [ -mr | -ur resp-dest ] | -q nqueries | -tr ttl | -ts ttl | -v | -vpn-instance vpn-instance-name | -w timeout ] * source source-address command to trace the multicast path from a multicast source to the querier.

  • Run the mtrace { -gw last-hop-router | -d } -r receiver [ -a source-ip-address | -l [ stat-times ] [ -st stat-int ] | -m max-ttl | [ -mr | -ur resp-dest ] | -q nqueries | -tr ttl | -ts ttl | -v | -vpn-instance vpn-instance-name | -w timeout ] * source source-address command to trace the RPF path from a multicast source to a destination host.
  • Run the mtrace { -gw last-hop-router | -b | -d } -r receiver -g group [ -a source-ip-address | -l [ stat-times ] [ -st stat-int ] | -m max-ttl | [ -mr | -ur resp-dest ] | -q nqueries | -tr ttl | -ts ttl | -v | -vpn-instance vpn-instance-name | -w timeout ] * source source-address command to trace the multicast path from a multicast source to a destination host.

Follow-up Procedure

Run the display mtrace statistics command to display statistics about an mtrace test instance. After multiple MTrace tests are performed, the accumulated statistics make the analysis result inaccurate. In this case, run the reset mtrace statistics command to reset MTrace statistics.

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Updated: 2019-08-21

Document ID: EDOC1000141903

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