Monitoring IGMP
You can establish a reference point for IGMP statistics by setting the statistics counters to zero.
To display IGMP parameters, use the show commands described in this section.
baseline ip igmp
(host1)#baseline ip igmp
show ip igmp
- Routing Process—Routing process for this VR (IGMP)
- Administrative state—Status of IGMP in the software: enabled or disabled
- Operational state—Status of IGMP on the VR: enabled or disabled
- Total interfaces—Number of interfaces on which you started IGMP
- enabled—Number of interfaces on which IGMP is enabled
- disabled—Number of interfaces on which IGMP is disabled
- learnt groups—Number of multicast groups that the VR has discovered
- IGMP graceful restart duration—Restart interval in seconds
- IGMP Statistics Rcvd—Statistics for IGMP messages received
- total—Total number of IGMP messages received
- checksum errors—Number of IGMP messages received with checksum errors
- unknown types—Number of IGMP messages received that are not group membership queries, group membership reports, or leave group membership messages
- queries—Number of group membership queries
- reports—Number of group membership reports
- leaves—Number of leave group membership messages
host1:boston#show ip igmp
Routing Process IGMP, Administrative state enabled, Operational state enabled
2 total interfaces, 2 enabled, 0 disabled
0 enabled interfaces performing graceful restart
2 learnt groups
IGMP Statistics:
Rvcd: 1 total, 0 checksum errors, 0 unknown types
0 queries, 1 reports, 0 leaves
Sent: 11 total
show ip igmp groups
- Use to display statically joined and directly connected groups learned through IGMP.
- Field descriptions
- Grp Address—Address of the multicast group
- Interface—Interface that discovered the multicast group
- oif-map—Name of the OIF map and the mapped OIF interface, when a group or source has been mapped to an OIF
- State—IGMP version on the interface
- ExpTim—Time, in seconds, at which the router stops polling for more members of this group
- oldHTo—Time at which the router stops polling for more IGMPv1 members of a group. If this value is 0, the interface has received no IGMPv1 reports for the group.
- Included Sources—Sources included in the multicast group
- Excluded Sources—Sources excluded from the multicast group
- Counts—Number of source-group mappings by version and state
host1:boston#show ip igmp groups
Grp Address Interface State Reporter ExpTim oldHTo
--------------- --------------- ----------- --------------- ------ ------
228.1.1.1 FastEthernet1/1 Version3 17.0.0.2 44 0
228.1.1.2 FastEthernet1/1 Version3 17.0.0.2 50 0
228.1.1.3 FastEthernet1/1 Version3 17.0.0.2 48 0
230.1.1.1 FastEthernet1/1 Version3 17.0.0.2 44 0
Included Sources:
51.0.0.1 44
51.0.0.2 44
51.0.0.3 44
231.1.1.1 FastEthernet1/1 Version3 17.0.0.2 44 0
Excluded Sources:
51.0.0.1 0
51.0.0.2 0
51.0.0.3 0
Counts: 5 version-3, 0 version-2, 0 version-1, 0 check state, 0 disabled
(5 total)
0 excluded
Source-groups: 3 included, 3 excluded
host1:boston#show ip igmp groups
Grp Address Interface State Reporter ExpTim oldHTo
--------------- --------------- ----------- --------------- ------ ------
232.1.1.1 ATM5/0.12 Version3 1.1.1.2 371 0
oif-map OIFMAP ATM5/0.121
232.1.1.1 ATM5/0.13 Version3 1.1.1.3 375 0
oif-map OIFMAP ATM5/0.121
232.1.1.2 ATM5/0.12 Version3 1.1.1.2 373 0
Included Sources:
10.1.1.2 oif-map OIFMAP self 373
10.1.1.10 oif-map OIFMAP ATM5/0.120 373
10.1.1.11 oif-map OIFMAP ATM5/0.121 373
232.1.1.2 ATM5/0.13 Version3 1.1.1.3 375 0
Included Sources:
10.1.1.2 oif-map OIFMAP self 375
10.1.1.10 oif-map OIFMAP ATM5/0.120 375
10.1.1.11 oif-map OIFMAP ATM5/0.121 375
Counts: 4 version-3, 0 version-2, 0 version-1, 0 check state, 0 disabled
(4 total)
0 excluded
Source-groups: 6 included, 0 excluded
show ip igmp interface
- Use to display IGMP information for interfaces on which you enabled IGMP.
- Specify the brief keyword to see a summary of the information.
- Specify the count keyword to see the number of IGMP interfaces.
- Specify the group address keyword to see information for interfaces that belong to that group.
- Field descriptions
- Interface—Type of interface and interface specifier. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.
- address—IP address of the interface
- Administrative state—Status of the interface in the software: enabled or disabled
- Operational state—Physical status of the interface: enabled or disabled
- Version—IGMP version
- State—Function of the interface: querier or nonquerier
- Query Interval—Time interval in seconds at which this interface sends query messages
- Other querier present interval—Time in seconds that the interface waits before declaring itself as the querier
- Maximum response time—Time interval, in tenths of a second, during which this interface waits for a host to respond
- Last member query interval—Time, in tenths of a second, that this interface waits before sending a new query to a host that sends a group leave message
- Robustness—Number of times this interface sends IGMP messages
- Information about whether the interface accepts IGMP reports from hosts on any subnetwork
- Interface defaults to global promiscuous mode—Interface uses the setting of the igmp promiscuous command to determine whether it accepts IGMP reports from hosts on any subnetwork
- Inbound access source-group—Access list specified
- No inbound access source-group—No access list specified
- Immediate Leave—Setting of the ip igmp immediate-leave command: enabled or disabled
- Explicit Host Tracking—Setting of the ip igmp explicit-tracking command: enabled or disabled
- Max-Group limit—Number of IGMP groups that the interface can accept, as configured with the ip igmp group limit command
- Admission-Bandwidth limit—Value of the admission-bandwidth limit set for an interface that accepts IGMP groups, or No Limit
- Group Count—Number of IGMP groups that the interface has accepted
- IOA packet replication—Hardware multicast packet replication interface to which egress multicast packets on this interface are redirected
- Interface statistics Rcvd—Information about IGMP messages received on this interface
- reports—Number of group membership reports received
- leaves—Number of group leave messages received
- wrong version queries—Number of group membership queries received from devices running a different version of IGMP
- Interface statistics Sent—Number of IGMP messages this interface has sent
- Interface statistics Groups learned—Number of groups this interface has discovered
- Counts—Breakdown of IGMP interfaces
- down—Number of interfaces down
- init state—Number of interfaces in the initialization state
- querier—Number of querier interfaces
- non-querier—Number of non-querier interfaces
- Total—Total number of IGMP interfaces
host1:boston#show ip igmp interface
Interface ATM2/1.15 address 15.0.0.2/255.255.255.0
Administrative state enabled, Operational state enabled
Interface parameters:
Version 2
State Querier
Query Interval 125 secs, 53 secs before the next query
Other querier present interval 250 secs
Maximum response time 100 (in 10ths of a second)
Last member query interval 10 (in 10ths of a second)
Robustness 3
Interface defaults to global promiscuous mode
No inbound access group
No inbound access source-group
No inbound apply-oif-map
Immediate Leave: disabled
Explicit Host Tracking: enabled
Max-Group limit: No Limit
Admission-Bandwidth limit: No Limit
Group Count: 1
Interface statistics:
Rcvd: 0 reports, 0 leaves, 0 wrong version queries
Sent: 1 queries
Groups learned: 1
Counts: 0 down, 0 init state, 1 querier, 0 non-querier, 1 Total
Counts: 0 down, 0 init state, 1 querier, 0 non-querier, 1 Total
host1#show ip igmp interface gigabitEthernet 3/0.0
Interface GigabitEthernet3/0.0 address 10.1.1.1/255.255.255.0
Administrative state enabled, Operational state disabled
Interface parameters:
Version 2
State Down
Query Interval 125 secs
Other querier present interval 250 secs
Maximum response time 100 (in 10ths of a second)
Last member query interval 10 (in 10ths of a second)
Robustness 3
Interface defaults to global promiscuous mode
No inbound access group
No inbound access source-group
No inbound apply-oif-map
Immediate Leave: disabled
Explicit Host Tracking: enabled
Max-Group limit: No Limit
Admission-Bandwidth limit: No Limit
Group Count: 0
IOA packet replication gigabitEthernet 3/8.1
Interface statistics:
Rcvd: 0 reports, 0 leaves, 0 wrong version queries
Sent: 0 queries
Groups learned: 0
show ip igmp interface brief
- Use to display a summary of IGMP information for interfaces on which you enabled IGMP.
- Field descriptions
- Interface—Type of interface and interface specifier. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.
- Intf Address—IP address of the interface
- Ver—IGMP version
- State—Function of the interface: querier or nonquerier
- Querier—IP address of the querier on the network to which this interface connects
- QTime—Time interval, in seconds, at which this interface sends query messages
- QPTime—Time in seconds that the interface waits before declaring itself as the querier
- Count—Total number of IGMP interfaces
host1:boston#show ip igmp interface brief
Interface Intf Address Ver State Querier QTime QPTime
-------------- ---------- --- ------ ------------- ----- ---
fastEthernet0/0 192.168.1.250/24 2 Querier 192.168.1.250 28 0
atm3/0.2 21.1.1.1/8 2 Querier 21.1.1.1 26 0
Count: 2 interfaces
show ip igmp mapped-oif
- Use to display the current mappings to all mapped outgoing interfaces or to the specified mapped outgoing interface.
- Field descriptions
- OIF—Outgoing interface used in an OIF map
- Oper—Operation status of the outgoing interface
- Group Address—Multicast group IP address associated with the OIF
- Source Address—Source IP address associated with the OIF
- Join I/F—IGMP interface associated with the OIF
- Map Name—Name of the map associated to the OIF
- Counts—Number of source-group mappings to OIFs
host1#show ip igmp mapped-oif
OIF Oper Group Address Source Address Join I/F Map Name
--------------- ---- --------------- --------------- --------------- ----------
ATM5/0.120 Up 232.1.1.2 10.1.1.10 ATM5/0.12 OIFMAP
ATM5/0.13 OIFMAP
ATM5/0.121 Up 232.1.1.1 * ATM5/0.12 OIFMAP
ATM5/0.13 OIFMAP
232.1.1.2 10.1.1.11 ATM5/0.12 OIFMAP
ATM5/0.13 OIFMAP
Counts: 3 source-group mappings
show ip igmp membership
- Use to display IGMP membership information for multicast groups and (S, G) channels.
- Specify the tracked keyword to see interface information only for interfaces where explicit host tracking is enabled.
- Field descriptions
- Group—Multicast group or (S, G) channel
- Source—(S, G) entries that are forwarding traffic
- Reporter—Hosts that requested including sources or have not requested excluding sources. If listed under a group, host that sent exclude reports for the group. If listed under a source, host that requested traffic from this source for the group. For any (S, G), if listed under a source, indicates hosts interested in the traffic for this (S, G).
- ExpTim—Expiration time.
- Flags
- Interface—Type of interface and interface specifier. For details about interface types and specifiers, see JUNOSe Command Reference Guide, About This Guide.
host1#show ip igmp membership
Flags: M – Uses Oifmap S– SSM mapped T – tracked
1,2,3 – The version of IGMP the group is in
Reporter:
<ip-address> - last reporter if the group is not explicitly tracked
<n>/<m> - <n> reporters include mode, <m> reporters in exclude
Group Source Reporter ExpTim Flags Interface
--------------- --------------- ------------- ------ ------ ---------------
224.0.1.40 * 10.10.1.1 02:41 2S FastEthernet2/1
224.0.1.50 1/2 02:56 3MT FastEthernet2/2
11.10.0.21 02:56
11.10.2.22 02:30
20.30.0.11
11.10.0.23 02:48
20.30.0.12
11.10.0.21 02:56
20.30.0.13
11.10.0.21 02:56
11.10.0.22 02:30
11.10.0.23 02:48
224.0.1.60 20.20.0.1 01:56 3 FastEthernet2/3
10.30.0.100 02:45
10.30.0.101 02:35
10.30.0.102 02:15
10.30.0.104 stop
224.0.1.70 30.20.0.1 stop 3 FastEthernet2/4
40.30.0.100 01:10
40.30.0.101 01.24
239.0.1.80 2/0 stop 3T FastEthernet2/5
50.30.0.100
10.10.0.10 02:48
50.30.0.101
10.10.0.20 02:56
10.10.0.10 02:48
50.30.0.102 10.10.0.20 02:56
235.0.1.90 0/3 02:56 2T FastEthernet2/6
*
12.10.0.10 02:48
12.10.0.20 02:56
12.10.0.30 02:48
show ip igmp oif-map
- Use to display all outgoing interface (OIF) maps or the OIF map for the specified map name.
- Field descriptions
- Map Name—Name of the map associated to the show output
- Group Prefix—Multicast group IP prefix
- Source Prefix—Source IP prefix
- OIF—Outgoing interface associated with the group and source prefix
host1#show ip igmp oif-map
Map Name Group Prefix Source Prefix OIF
------------------ ------------------ ------------------ ------------------
OIFMAP 232.1.1.0/24 0.0.0.0/0 ATM5/0.121
232.1.1.0/24 10.1.1.2/32 self
232.1.1.0/24 10.1.1.10/32 ATM5/0.120
232.1.1.3/32 0.0.0.0/0 ATM5/0.130
232.1.1.4/32 0.0.0.0/0 ATM5/0.130
show ip igmp oif-mapping
- Use to display the mapped OIF that is assigned to a given map-name, group address, and source address.
- Field descriptions
- OIF-MAP Name—Name of the map requested
- Group Address—Multicast group IP address requested
- Source Address—Source IP address requested
- Mapped OIF—Interface associated with the OIF map
host1#show ip igmp oif-mapping OIFMAP 232.1.1.1 10.1.1.10
OIF Mapping
OIF-MAP Name : OIFMAP
Group Address : 232.1.1.1
Source Address : 10.1.1.10
Mapped OIF : ATM5/0.120
show ip igmp ssm-mapping
- Use to display the SSM mapping state and the source list mapping associated with a multicast group address.
- Field descriptions
- SSM Mapping—Status of SSM mapping on the interface: Enabled or Disabled
- Group Address—Multicast group address requested
- Source List—List of sources mapped to the multicast group address
host1:boston#show ip igmp ssm-mapping 232.1.1.1
SSM Mapping : Enabled
Group Address : 232.1.1.1
Source List : 172.1.1.1
: 172.1.1.2
show multicast group limit
- Use to display the number of IGMP groups that ports have accepted and, if configured, the maximum number of groups that ports can accept.
- A value of –1 indicates that no port group limit is configured.
- Only ports that have accepted IGMP groups and ports for which you have configured a limit for the number of IGMP groups appear in this display.
- Field descriptions
- slot—Number of the chassis slot in the range 0–6 (ERX-7xx models) and 0–13 (ERX-14xx models)
- port—Port number on the I/O module
- limit—Maximum number of IGMP groups that the port can accept. A value of –1 indicates that no limit has been specified.
- count—Actual number of IGMP groups that the port has accepted
host1:boston#show multicast group limit
Port limit count
--------- ----- -----
2/0 5 0
2/1 -1 1