Monitoring MLD
You can establish a reference point for MLD statistics by setting the statistics counters to zero.
To display MLD parameters, use the show commands described in this section.
baseline ipv6 mld
(host1)#baseline ipv6 mld
show ipv6 mld
- Administrative state—Status of MLD in the software: enabled or disabled
- Operational state—Status of MLD on the VR: enabled or disabled
- total interfaces—Number of interfaces on which you started MLD
- enabled—Number of interfaces on which MLD is enabled
- disabled—Number of interfaces on which MLD is disabled
- learned groups—Number of multicast groups that the VR has discovered
- MLD Statistics Rcvd—Statistics for MLD messages received
- total—Number of MLD messages received
- checksum errors—Number of MLD messages received with checksum errors
- unknown types—Number of messages received that are not multicast listener queries, multicast listener reports, or multicast listener done messages
- discards—Number of multicast listener discards
- queries—Number of multicast listener queries
- reports—Number of multicast listener reports
- leaves—Number of done messages
host1:boston#show ipv6 mld
Routing Process MLD, Administrative state enabled, Operational state enabled
4 total interfaces, 4 enabled, 0 disabled
2 learned groups
MLD Statistics:
Rcvd: 3 total, 0 checksum errors, 0 unknown types, 0 discards
0 queries, 3 reports, 0 leaves
Sent: 5 total
show ipv6 mld groups
- Use to display statically joined and directly connected groups learned through MLD.
- 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, if a group or source has been mapped to an OIF
- State—MLD version of the group
- Reporter—Link-local address of the host reporting the multicast group
- ExpTim—Remaining time, in seconds, at which the router stops polling for more members of this group
- oldHTo—Remaining time at which the router stops polling for more MLDv1 members of a group. If this value is 0, the interface has received no MLDv1 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 ipv6 mld groups
Grp Address Interface State Reporter ExpTim oldHTo
------------------- ---------------------- -------- --------------- ------ ------
ff0e::1 ATM2/0.15 Version2 fe80::90:1a02:1 54 0
640:91d
ff0e::4:1 ATM2/0.15 Version2 fe80::90:1a02:1 54 0
640:91d
Included Sources:
51::1 54
51::2 54
Counts: 2 version-2, 0 version-1, 0 check state, 0 disabled
(2 total)
0 excluded
Source-groups: 2 included, 0 excluded
host1:boston#show ipv6 mld groups
Grp Address Interface State Reporter ExpTim oldHTo
------------------- ---------------------- -------- --------------- ------ ------
ff3e::1 ATM5/0.12 Version2 fe80::f7:0:91a: 377 0
0
oif-map OIFMAP ATM5/0.
121
ff3e::1 ATM5/0.13 Version2 fe80::f7:0:a1a: 369 0
0
oif-map OIFMAP ATM5/0.
121
ff3e::2 ATM5/0.12 Version2 fe80::f7:0:91a: 370 0
0
Included Sources:
10::2 oif-map OIFMAP self 370
10::10 oif-map OIFMAP ATM5/0. 370
120
10::11 oif-map OIFMAP ATM5/0. 370
121
ff3e::2 ATM5/0.13 Version2 fe80::f7:0:a1a: 373 0
0
Included Sources:
10::2 oif-map OIFMAP self 373
10::10 oif-map OIFMAP ATM5/0. 373
120
10::11 oif-map OIFMAP ATM5/0. 373
121
Counts: 4 version-2, 0 version-1, 0 check state, 0 disabled
(4 total)
0 excluded
Source-groups: 6 included, 0 excluded
show ipv6 mld interface
- Use to display MLD information for interfaces on which you enabled MLD.
- Specify the brief keyword to see a summary of the information.
- Specify the count keyword to see the number of MLD interfaces.
- 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—IPv6 link-local 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—MLD version
- State—Function of the interface: querier or nonquerier
- Query Interval—Time interval at which this interface sends query messages
- Other querier present interval—Time that the interface waits before declaring itself as the querier
- Maximum response time—Time interval during which this interface expects a host to respond
- Last member query interval—Time 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 MLD messages
- Information about IPv6 access lists configured with the ipv6 mld access-group command
- Inbound access source-group—Access list specified
- No inbound access source-group—No access list specified
- Immediate Leave—Setting of the ipv6 mld immediate-leave command: enabled or disabled
- Explicit Host Tracking—Setting of the ipv6 mld explicit-tracking command: enabled or disabled
- Max-Group limit—Number of MLD groups that the interface can accept, as configured with the ipv6 mld group limit command
- Group Count—Number of MLD 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 MLD messages received on this interface
- reports—Number of group multicast listener reports received
- leaves—Number of group multicast listener done messages received
- wrong version queries—Number of multicast listener queries received from devices running a different version of MLD
- Interface statistics Sent—Number of MLD messages this interface has sent
- Interface statistics Groups learned—Number of groups this interface has discovered
- Counts—Total number of MLD interfaces
host1:boston#show ipv6 mld interface
Interface ATM5/0.1 address fe80::f7:0:321a:0
Administrative state enabled, Operational state enabled
Interface parameters:
Version 1
State Querier
Query Interval 125 secs, 123 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
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
Group Count: 0
Interface statistics:
Rcvd: 0 reports, 0 leaves, 0 wrong version queries
Sent: 14 queries
Groups learned: 0
Counts: 0 down, 0 init state, 1 querier, 0 non-querier, 1 Total
host1#show ipv6 mld interface gigabitEthernet 3/0.0
Interface GigabitEthernet3/0.0 address 10.1.1.1/255.255.255.0
Administrative state enabled, Operational state enabled
Interface parameters:
Version 1
State Querier
Query Interval 125 secs, 123 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
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
Group Count: 0
IOA packet replication gigabitEthernet 3/8.1
Interface statistics:
Rcvd: 0 reports, 0 leaves, 0 wrong version queries
Sent: 14 queries
Groups learned: 0
Counts: 0 down, 0 init state, 1 querier, 0 non-querier, 1 Total
show ipv6 mld interface brief
- Use to display a summary of MLD information for interfaces on which you enabled MLD.
- 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—IPv6 link-local address of the interface
- Ver—MLD version
- State—Function of the interface: querier or nonquerier
- Querier—IPv6 address of the querier on the network to which this interface connects
- QTime—Remaining time interval at which this interface sends query messages
- QPTime—Remaining time that the interface waits before declaring itself as the querier
host1:boston#show ipv6 mld interface brief
Interface Intf Address Ver State Querier QTime QPTime
--------------- --------------- --- ----------- --------------- ------ ------
ATM5/0.1 fe80::f7:0:231a 1 Querier fe80::f7:0:231a 1 0
:0 :0
ATM5/0.200 fe80::f7:0:231a 2 Querier fe80::f7:0:231a 20 0
:0 :0
Counts: 0 down, 0 init state, 2 querier, 0 non-querier, 2 Total
show ipv6 mld 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—MLD protocol 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 ipv6 mld mapped-oif
OIF Oper Group Address Source Address Join I/F Map Name
--------------- ---- --------------- --------------- --------------- ----------
ATM5/0.120 Up ff3e::2 10::10 ATM5/0.12 OIFMAP
ATM5/0.13 OIFMAP
ATM5/0.121 Up ff3e::1 * ATM5/0.12 OIFMAP
ATM5/0.13 OIFMAP
ff3e::2 10::11 ATM5/0.12 OIFMAP
ATM5/0.13 OIFMAP
Counts: 3 source-group mappings
show ipv6 mld 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 IPv6 prefix
- Source Prefix—Source IPv6 prefix
- OIF—Outgoing interface associated with the group and source prefix
host1#show ipv6 mld oif-map
Map Name Group Prefix Source Prefix OIF
------------------ ------------------ ------------------ ------------------
OIFMAP ff3e::/112 ::/0 ATM5/0.121
ff3e::/112 10::2/128 self
ff3e::/112 10::10/128 ATM5/0.120
ff3e::3/128 ::/0 ATM5/0.130
ff3e::4/128 ::/0 ATM5/0.130
show ipv6 mld membership
- Use to display MLD membership information for multicast groups and (S, G) channels.
- Specify the brief keyword to see a summary of the information.
- 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 that 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:boston#show ipv6 mld membership
Flags: M – Uses Oifmap S– SSM mapped T – tracked
1,2 – The version of MLD 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
--------- -------- ---------------------- ------ ------ ---------------
ff0e::40 * fe80::90:1a02:1640:91d 02:41 2S FastEthernet2/1
ff0e::50 1/2 02:56 3MT FastEthernet2/2
fe80::90:1a02:1640:911 02:30
fe80::90:1a02:1640:912 02:48
20::11
fe80::90:1a02:1640:913 02:56
20::12
fe80::90:1a02:1640:911 02:30
20::13
fe80::90:1a02:1640:911 02:30
fe80::90:1a02:1640:912 02:48
fe80::90:1a02:1640:913 02:56
ff0e::60 fe80::90:1a02:1640:901 01:56 3 FastEthernet2/3
10::10 02:45
10::11 02:35
10::12 02:15
10::14 stop
ff0e::70 fe80::90:1a02:1640:91 stop 3 FastEthernet2/4
40::10 01:10
40::11 01.24
ff0e::80 2/0 stop 3T FastEthernet2/5
50::10
fe80::90:1a02:1650:910 02:48
50::11
fe80::90:1a02:1650:920 02:56
fe80::90:1a02:1650:910 02:48
50::12 fe80::90:1a02:1650:920 02:56
ff0e::90 0/3 02:56 2T FastEthernet2/6
*
fe80::90:1a02:1660:910 02:48
fe80::90:1a02:1660:920 02:56
fe80::90:1a02:1660:930 02:48
show ipv6 mld oif-mapping
- Use to display the mapped OIF to be 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—Join interface associated with the OIF map
host1#show ipv6 mld oif-mapping OIFMAP ff3e::1 10::10
OIF Mapping
OIF-MAP Name : OIFMAP
Group Address : ff3e::1
Source Address : 10::10
Mapped OIF : ATM5/0.120
show ipv6 mld 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 ipv6 mld ssm-mapping ff3e::1
SSM Mapping : Enabled
Group Address : ff3e::1
Source List : 2001::1
: 2001::2
show multicast group limit
- Use to display the number of MLD 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 MLD groups and ports for which you have configured a limit for the number of MLD groups appear in this display.
- Field descriptions
- slot—Number of the chassis slot in the range 0–6 (ERX-7xx models) or 0–13 (ERX-14xx models)
- port—Port number on the I/O module
- limit—Maximum number of MLD groups that the port can accept. A value of –1 indicates that no limit has been specified.
- count—Actual number of MLD groups the port has accepted
host1:boston#show multicast group limit
Port limit count
--------- ----- -----
2/0 5 0
2/1 -1 1