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Viewing IGMP Groups
To view both learned and statically configured IGMP groups, use the following command.
• View both learned and statically configured IGMP groups.
EXEC Privilege mode
show ip igmp groups
Example of the
show ip igmp groups
Command
Dell#show ip igmp groups
Total Number of Groups: 2
IGMP Connected Group Membership
Group Address Interface Mode Uptime Expires Last
Reporter
225.1.1.1 TenGigabitEthernet 1/1/1 IGMPV2 00:11:19 00:01:50
165.87.34.100
225.1.2.1 TenGigabitEthernet 1/1/1 IGMPV2 00:10:19 00:01:50
165.87.31.100
Adjusting Timers
The following sections describe viewing and adjusting timers.
To view the current value of all IGMP timers, use the following command.
• View the current value of all IGMP timers.
EXEC Privilege mode
show ip igmp interface
For more information, refer to the example shown in
Viewing IGMP Enabled Interfaces
.
Adjusting Query and Response Timers
The querier periodically sends a general query to discover which multicast groups are active. A group
must have at least one host to be active.
When a host receives a query, it does not respond immediately, but rather starts a delay timer. The delay
time is set to a random value between 0 and the maximum response time. The host sends a response
when the timer expires; in version 2, if another host responds before the timer expires, the timer is
nullified, and no response is sent.
The maximum response time is the amount of time that the querier waits for a response to a query
before taking further action. The querier advertises this value in the query (refer to the illustration in
IGMP
Version 2
). Lowering this value decreases leave latency but increases response burstiness because all host
membership reports must be sent before the maximum response time expires. Inversely, increasing this
value decreases burstiness at the expense of leave latency.
When the querier receives a leave message from a host, it sends a group-specific query to the subnet. If
no response is received, it sends another. The amount of time that the querier waits to receive a response
to the initial query before sending a second one is the last member query interval (LMQI). The switch
waits one LMQI after the second query before removing the group from the state table.
• Adjust the period between queries.
Internet Group Management Protocol (IGMP)
361
Содержание S6000-ON
Страница 1: ...Dell Configuration Guide for the S6000 ON System 9 9 0 0 ...
Страница 505: ...Figure 60 Inspecting Configuration of LAG 10 on ALPHA Link Aggregation Control Protocol LACP 505 ...
Страница 508: ...Figure 62 Inspecting a LAG Port on BRAVO Using the show interface Command 508 Link Aggregation Control Protocol LACP ...
Страница 509: ...Figure 63 Inspecting LAG 10 Using the show interfaces port channel Command Link Aggregation Control Protocol LACP 509 ...
Страница 552: ...mac address table static multicast mac address vlan vlan id output range interface 552 Microsoft Network Load Balancing ...
Страница 557: ...Figure 80 Configuring OSPF and BGP for MSDP Multicast Source Discovery Protocol MSDP 557 ...
Страница 558: ...Figure 81 Configuring PIM in Multiple Routing Domains 558 Multicast Source Discovery Protocol MSDP ...
Страница 562: ...Figure 83 MSDP Default Peer Scenario 1 562 Multicast Source Discovery Protocol MSDP ...
Страница 563: ...Figure 84 MSDP Default Peer Scenario 2 Multicast Source Discovery Protocol MSDP 563 ...
Страница 564: ...Figure 85 MSDP Default Peer Scenario 3 564 Multicast Source Discovery Protocol MSDP ...
Страница 665: ...Policy based Routing PBR 665 ...
Страница 672: ...ip pim bsr border Remove candidate RP advertisements clear ip pim rp mapping 672 PIM Sparse Mode PIM SM ...
Страница 818: ...Figure 110 Single and Double Tag TPID Match 818 Service Provider Bridging ...
Страница 819: ...Figure 111 Single and Double Tag First byte TPID Match Service Provider Bridging 819 ...
Страница 995: ...Figure 140 Setup OSPF and Static Routes Virtual Routing and Forwarding VRF 995 ...