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62 ZT8101 User’s Guide
Using the Telnet Console
The Router Port table contains the VLAN name, and under the port groupings (1 to 8, 9 to 16, 17 to
24, and 25 to 26), a port is assigned an “S” if the port is a static router port, a “D” if the port has
been dynamically assigned to be a router port, or a “-” if the port is not a router port.
To view the IGMP snooping status
You can view IGMP group information for each VLAN.
1. From the Main Menu, select Network Monitoring | IGMP Snooping Status and press Enter.
2. In the VLAN Name field, enter the name of the VLAN to retrieve IGMP snooping
information. Highlight FIND and press Enter.
The IGMP Snooping Status screen contains the following information.
To view the IP multicast forwarding table
You can browse the IP multicast forwarding table for static and dynamic (learned) entries. You can
also search the table using a combination of a multicast group IP address, a multicast source IP
address, and a subnet mask.
1. From the Main Menu, select Network Monitoring | IP Multicast Forwarding Table and
press Enter.
2. Enter the following: a multicast group address, a source IP address, and a source subnet mask
address. To find all multicast groups known to the switch, use 0.0.0.0 for all the addresses.
3. Highlight FIND and press Enter.
The IP Multicast Forwarding Table contains the following information.
To view the IGMP group table
You can view IGMP information for an IP interface name and a multicast group IP address.
1. From the Main Menu, select Network Monitoring | IGMP Group Table and press Enter.
2. Enter the name of an IP interface and the IP address of a multicast group. To find all multicast
groups, use 0.0.0.0 for the address.
Column Description
Multicast group The IP address of a multicast group learned by IGMP snooping.
MAC address The corresponding MAC address learned by IGMP snooping.
Reports The number of IGMP reports for the listed source.
Column Description
Multicast Group The IP address of a multicast group used in the search for a specific entry.
Source IP Addr. The IP address of a multicast source used in the search for a specific entry.
Source Mask
The subnet mask of a multicast source used in the search for a specific
entry.
Upstream Neighbor
The IP address of the next hop router between the multicast group and the
source.
Expire Time The number of seconds the packets from the multicast source can live.
Prot. The multicast routing protocol used by the current source.