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DES-3500 Layer 2 Fast Ethernet Switch CLI Reference Manual
151
config router_ports_forbidden
Description This command allows designation of a port or range of ports as being
forbidden to multicast-enabled routers. This will ensure that multicast
packets will not be forwarded to this port − regardless of protocol, etc.
Parameters
<vlan_name 32> − The name of the VLAN on which the router port
resides.
[add | delete] - Specifies whether to add or delete forbidden ports of
the specified VLAN.
<portlist> − Specifies a range of ports that will be configured as
forbidden router ports.
Restrictions Only Administrator and Operator-level users can issue this command.
Example usage:
To set up forbidden router ports:
DES-3526:admin#
config router_ports_forbidden default add
2-10
Command: config router_ports_forbidden default add 2-10
Success.
DES-3526:admin#
enable igmp_snooping
Purpose Used to enable IGMP snooping on the Switch.
Syntax
enable igmp_snooping {forward_mcrouter_only}
Description This command allows users to enable IGMP snooping on the Switch.
If forward_mcrouter_only is specified, the Switch will only forward all
multicast traffic to the multicast router, only. Otherwise, the Switch
forwards all multicast traffic to any IP router.
Parameters
forward_mcrouter_only − Specifies that the Switch should only
forward all multicast traffic to a multicast-enabled router. Otherwise,
the Switch will forward all multicast traffic to any IP router.
Restrictions Only Administrator and Operator-level users can issue this command.
Example usage:
To enable IGMP snooping on the Switch:
DES-3526:admin#enable igmp_snooping
Command: enable igmp_snooping
Success.
DES-3526:admin#
disable igmp_snooping
Purpose Used to enable IGMP snooping on the Switch.
Syntax
disable igmp_snooping {forward_mcrouter_only}
Description This command disables IGMP snooping on the Switch. IGMP
snooping can be disabled only if IP multicast routing is not being
used. Disabling IGMP snooping allows all IGMP and IP multicast