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Cisco Employee

Disable igmp process on interface in IOS

Hello fourm,

Question on how to disable IGMP on a router interface - in this case Gig 0/2 on an ISR G2.  

Rotuer is an ISR G2 running 15.2(1)T code and I want to disable all multicast processing on the interface.

Here is what I see:

c2911-rtr#show ip igmp interface gigabitEthernet 0/2

GigabitEthernet0/2 is up, line protocol is up

  Internet address is

  IGMP is enabled on interface

  Current IGMP host version is 2

  Current IGMP router version is 2

  IGMP query interval is 60 seconds

  IGMP configured query interval is 60 seconds

  IGMP querier timeout is 120 seconds

  IGMP configured querier timeout is 120 seconds

  IGMP max query response time is 10 seconds

  Last member query count is 2

  Last member query response interval is 1000 ms

  Inbound IGMP access group is not set

  IGMP activity: 1 joins, 0 leaves

  Multicast routing is disabled on interface

  Multicast TTL threshold is 0

  Multicast groups joined by this system (number of users):


c2911-rtr#show ip interface gigabitEthernet 0/2

GigabitEthernet0/2 is up, line protocol is up

  Internet address is

  Broadcast address is

  Address determined by DHCP

  MTU is 1500 bytes

  Helper address is not set

  Directed broadcast forwarding is disabled

  Multicast reserved groups joined:

  Outgoing access list is not set

  Inbound  access list is 105

  Proxy ARP is disabled

  Local Proxy ARP is disabled

  Security level is default

  Split horizon is enabled

  ICMP redirects are never sent

  ICMP unreachables are always sent

  ICMP mask replies are never sent

  IP fast switching is enabled

  IP fast switching on the same interface is enabled

  IP Flow switching is disabled

  IP CEF switching is enabled

  IP CEF switching turbo vector

  IP multicast fast switching is enabled

  IP multicast distributed fast switching is disabled

  IP route-cache flags are Fast, CEF

  Router Discovery is disabled

  IP output packet accounting is disabled

  IP access violation accounting is disabled

  TCP/IP header compression is disabled

  RTP/IP header compression is disabled

  Policy routing is disabled

  Network address translation is enabled, interface in domain outside

  BGP Policy Mapping is disabled

  Input features: Common Flow Table, Stateful Inspection, Virtual Fragment Reassembly, Access List, Virtual Fragment Reassembly After IPSec Decryption, NAT Outside, MCI Check

  Output features: Post-routing NAT Outside, Common Flow Table, Stateful Inspection, NAT ALG proxy

  WCCP Redirect outbound is disabled

  WCCP Redirect inbound is disabled

  WCCP Redirect exclude is disabled


Multicast is disabled:

c2911-rtr#show ip multicast

  Multicast Routing: disabled

  Multicast Multipath: disabled

  Multicast Route limit: No limit

  Multicast Fallback group mode: Dense

  Number of multicast boundaries configured with filter-autorp option: 0


c2911-rtr#show ip igmp snooping

Global IGMP Snooping configuration:


IGMP snooping              : Disabled

IGMPv3 snooping            : Disabled

Report suppression         : Disabled

TCN solicit query          : Disabled

Last Member Query Interval : 1000





c2911-rtr#show ip igmp membership

Flags: A  - aggregate, T - tracked

       L  - Local, S - static, V - virtual, R - Reported through v3

       I - v3lite, U - Urd, M - SSM (S,G) channel

       1,2,3 - The version of IGMP, the group is in


       / - Filtering entry (Exclude mode (S,G), Include mode (G))


       <mac-or-ip-address> - last reporter if group is not explicitly tracked

       <n>/<m>      - <n> reporter in include mode, <m> reporter in exclude

Channel/Group                  Reporter        Uptime   Exp.  Flags  Interface

*,        03:42:36 02:15 2A     BV1

*,       6d00h    02:20 2A     BV1

*,       6d00h    02:24 2A     BV1

*,               6d00h    02:17 2A     BV1

*,            6d00h    02:16 2LA    IS0/0

*,            6d00h    02:16 2LA    SM1/0

*,             6d00h    stop  2LA    Gi0/2

*,            6d00h    02:19 2LA    IS0/0

*,                  6d00h    never 2LA    Em0/0



Here is  how I have the interface configued:


interface GigabitEthernet0/2

ip address dhcp client-id GigabitEthernet0/2 hostname c2911-rtr

ip access-group 105 in

no ip redirects

no ip proxy-arp

ip nbar protocol-discovery

no ip mfib forwarding input

no ip mfib forwarding output

ip nat outside

ip virtual-reassembly in

ip route-cache same-interface

load-interval 30

duplex auto

speed auto

no cdp enable

no mop enabled


any ideas?

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