Configuration Guide User guide

FastIron Configuration Guide 1623
53-1002494-02
MLD snooping configuration
If the L2 protocol is unable to detect a topology change, the fast-convergence feature may not work.
For example, if the direct connection between two devices switches from one interface to another,
the rapid spanning tree protocol (802.1w) considers this an optimization action, rather than a
topology change. In this case, other devices will not receive topology change notifications and will
be unable to send queries to speed up the convergence. The original spanning tree protocol does
not recognize optimization actions, and fast-convergence works in all cases.
To enable fast-convergence, enter commands such as the following.
Brocade(config)#vlan 70
Brocade(config-vlan-70)#mld-snooping fast-convergence
Syntax: [no] mld-snooping fast-convergence
Displaying MLD snooping information
You can display the following MLD snooping information:
• MLD snooping error information
• Group and forwarding information for VLANs
• Information about MLD snooping mcache
• MLD memory pool usage
• Status of MLD traffic
• MLD information by VLAN
Displaying MLD snooping error information
To display information about possible MLD errors, enter the following command.
Brocade#show ipv6 mld-snooping error
snoop SW processed pkt: 173, up-time 160 sec
Syntax: show ipv6 mld-snooping error
The following table describes the output from the show ipv6 mld-snooping error command.
Displaying MLD group information
To display MLD group information, enter the ipv6 mld-snooping group command.
Field Description
SW processed pkt The number of IPv6 multicast packets processed by MLD snooping.
up-time The MLD snooping up time.
Brocade#show ipv6 mld-snooping group
p-:physical, ST:static, QR:querier, EX:exclude, IN:include, Y:yes, N:no
VL1 : 263 grp, 263 grp-port, tracking_enabled
group p-port ST QR life mode source
1 ff0e::ef00:a0e3 1/7 N Y 120 EX 0
2 ff01::1:f123:f567 1/9 N Y IN 1