Displaying the unicast FIB
Use the following procedure to display the unicast FIB.
In SPBM, B-MAC addresses are carried within the IS-IS link-state database. To do this, SPBM supports an IS-IS TLV that advertises the I-SID and B-MAC information across the network. Each node has a System ID, which also serves as Backbone MAC address (B-MAC) of the switch. These Backbone MAC addresses are populated into the SPBM VLAN Forwarding Information Base (FIB).
When the network topology is discovered and stored in the IS-IS link-state database, each node calculates shortest path trees for each source node, so that a unicast path now exists from every node to every other node. With this information, each node populates unicast information received from SPBM into the FIB for forwarding purposes.
Procedure
- In the navigation pane, expand .
- Click SPBM.
- Click the Unicast FIB tab.
Unicast FIB field descriptions
Use the data in the following table to use the Unicast FIB tab.
|
Name |
Description |
|---|---|
|
SysId |
Specifies the system ID of the node where the unicast FIB entry originated. |
|
Vlan |
Specifies the VLAN of the unicast FIB entry. |
|
DestinationMacAddr |
Specifies the destination MAC Address of the unicast FIB entry. |
|
OutgoingPort |
Specifies the outgoing port of the unicast FIB entry. |
|
HostName |
Specifies the host name of the node where unicast FIB entry originated. |
|
Cost |
Specifies the cost of the unicast FIB entry. |