Linksys 4116 - EtherFast Switch User Manual page 24

Using the Administration Tool
Field
Community Strings
Discovery Depth
CMM discovers all routers in the network that are multicast enabled and have interfaces participating in
multicast routing. If the discovery fails to find any routers, or if there are routers in the network that you
expected to discover but did not, check the following:
•
•
•
•
When discovery is complete, the browser window displays the time it took to discover the network, and
the number of devices discovered:
Discovery took 15 seconds
Discovered 5 routers
The amount of time the discovery takes depends on the number of routers, number of interfaces, and
router types.
If the discovery seems to stop at a particular router, or seems to pause, check that particular router's
connectivity to its PIM neighbors. Also, check the PIM neighbor to see if it supports the PIM and
IPMROUTE MIBs. Again, because the discovery is multicast specific, unless these MIBs are supported,
the device will not be included in the database. Issuing the sh snmp mib command on a router gives this
information.
When discovery has finished, you can view the discovered routers in the lower left pane.
Adding or Re-discovering a Single Device
To add or re-discover a single device:
Step 1 Within the Administration tool, click on Discovery.
Click Multicast. The Multicast Discovery page appears (see
Step 2
Within the Add/Rediscover a Single Device pane, enter the
Step 3
Next to Management Domain, select the domain you want to discover or add to (only domains that are
Step 4
created from the System Configuration window appear here). If you select a different domain from the
default, you must complete steps 1 and 2 again.
Complete the fields in the Add/Rediscover a Single Device pane (see field descriptions below) and click
Step 5
Add/Rediscover to continue. As devices are discovered, they appear in the browser window.
User Guide for the Cisco Multicast Manager 2.3.3
1-14
Connectivity to the routers
SNMP community strings on the routers
Discovery depth setting—is it sufficient
SNMP ACLs on the routers
Chapter 1 Using the Cisco Multicast Manager
Description
You can add additional community strings if
required.
Number of PIM neighbors the CMM will discover
from the seed router (similar to a hop count).
Figure 1-4).
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