Monitoring and Configuring the Forwarding Cache (Layer 3)

2.Use Table 11-3 to review the forwarding statistics:

Table 11-3.Forwarding Statistical Parameters

Parameter

Defines the...

 

 

FIRE Fabric Port

Fabric port associated with the Layer 3 module. The switch has

 

13 fabric ports. Each module slot uses two fabric ports with the

 

exception of the supervisor module slot which uses one fabric

 

port. Hence, the supervisor module slot uses fabric port 1, the

 

next media module slot uses fabric ports 2 and 3, and so on.

 

 

L3 Total (T2)

Total number of frames received on the fabric port.

 

 

L3 Frame Cache Hits

Number of packets received on the fabric port that were

 

successfully matched against existing forwarding entries in the

 

Layer 3 (L3) address cache.

 

 

Percent Cache Hits

Total percentage of successful matches between packets

 

received on a fabric port and the percent of those packets that

 

matched the Layer 3 address cache entries.

 

 

L3 Slow Path Frames

Number of frames received on a fabric port that were not

 

successfully matched against existing forwarding entries in the

 

Layer 3 (L3) address cache. Subsequently, these frames were

 

forwarded to the supervisor module (slow path). All frames

 

sent to the supervisor module are routed in software.

 

 

Percent Slow Path

Total percentage of unsuccessful matches between packets

 

received on a fabric port and the percent of those packets that

 

did not match the Layer 3 address cache entries.

 

 

L3 Drop Frames

Number of Layer 3 frames that were dropped because they did

 

not match the Layer 3 address cache entries.

 

 

Percent Drops

Total percent of Layer 3 frames dropped.

 

 

RX Frame Count (T2)

Total number of frames received on a fabric port.

 

 

L2 Frame Count (T2)

Number of Layer 2 frames received on a fabric port that were

 

forwarded on to an associated VLAN.

 

 

Searching the Routing Cache for an Entry

To search the L3 address cache:

1.In the L3 Forwarding Cache section of the Web Agent window, click Entry Search. The Route Cache Entry Search dialog box opens.

2.Select the search criteria you want to use to find more specific information on available routes. For example, if you want to find all entries in the routing cache that contain a VLAN entry of vlan_10.0.1.1, you would search by VLAN and specify vlan_10.0.1.1 as your search value.

11-4

Cajun P550/P220 Switch Operation Guide