Cabletron Systems CoreWatch, User Manual

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CoreWatch User’s Manual 427
Chapter 20: Checking the Status of Routing Tables
upper frame. For details on using the Table toolbar, see Appendix A: “Working with
Tables” on page 443 .
Table 70. IGMP Interface table fields
Field Description
Index Identifies an IP interface on which IGMP is enabled.
Query Interval Indicates how often the SSR sends IGMP Host-Query packets
on the interface. An IGMP router sends hosts a Host-Query
packet to learn which hosts are available.
The specified interval applies to all SSR ports. The time given
is in seconds. The default is 125 seconds.
Status Indicates whether IGMP is currently enabled on the interface.
Version Indicates which version of IGMP is running on the interface.
All IGMP routers on a LAN must be running the same version
of IGMP on that LAN.
The SSR runs version 2, but can communicate with hosts
running version 1.
If Querier Identifies the IP address of the IGMP Querier on the IP
subnetwork to which the interface is attached. The IGMP
Querier looks for the hosts of an IGMP router.
Max Response Time Indicates how long the SSR waits for IGMP Host Membership
responses from the hosts. The wait time you set applies to all
ports on the SSR.
Ver. 1 Querier Time Indicates how much longer the SSR will assume that there are
no IGMP version 1 routers running on the interface. As long as
this time is greater than 0, the SSR continues to reply to all
queries with version 1 membership reports.
Wrong Ver. Queries Indicates how many queries the SSR received from hosts
running a version of IGMP different from the one running on
the SSR.
A value greater than 0 indicates a configuration problem
because IGMP requires that all routers on a LAN be
configured to run the same version of IGMP.