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Cisco Bug: CSCup27928 - CRS: 4.1.2: Problem to disable IGMP on subinterface

Last Modified

Jul 20, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases


Description (partial)

With multicast routing configured on all interfaces if attempt disable on some interfaces as below:

 address-family ipv4
  interface POS0/3/4/0
  interface TenGigE0/3/1/0
  interface TenGigE0/3/1/0.10
   disable   <—————————Disabled
  interface TenGigE0/3/1/0.20
  interface all enable
  accounting per-prefix

find that when checking the IGMP status of the interfaces to make sure they were disabled that the physical interfaces are but the sub-interfaces are not:

RP/0/RP0/CPU0:TCRS-1A-RJ_RIO01#sh igmp interface pos0/3/4/0

POS0/3/4/0 is up, line protocol is up
  Internet address is
  IGMP is disabled on interface
RP/0/RP0/CPU0:TCRS-1A-RJ_RIO01#sh igmp interface te0/3/1/0.10

TenGigE0/3/1/0.10 is up, line protocol is up
  Internet address is
  IGMP is enabled on interface   <———————Still Enabled
  Current IGMP version is 3
  IGMP query interval is 60 seconds
  IGMP querier timeout is 125 seconds
  IGMP max query response time is 10 seconds
  Last member query response interval is 1 seconds
  IGMP activity: 2 joins, 0 leaves
  IGMP querying router is (this system)

try to disable multicast on a sub-interface under multicast-routing
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