Displaying the IPv6 unicast FIB

Use the following procedure to display the IPv6 unicast Forwarding Information Base (FIB). The tab shows IPv6 routes from remote Backbone Edge Bridges (BEBs)

In SPBM, 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.

I-SIDs are only used for virtual services (Layer 2 VSNs and Layer 3 VSNs). If you only enable IP Shortcuts on the Backbone Edge Bridges, I-SIDs are never exchanged in the network as IP Shortcuts allows for Global Routing Table (GRT) IP networks to be transported across IS-IS.

Procedure

  1. In the navigation pane, expand Configuration > IS-IS.
  2. Click SPBM.
  3. Click the IPv6 Unicast FIB tab.

IPv6 Unicast FIB Field Descriptions

Use the data in the following table to use the IPv6 Unicast FIB tab.

Name

Description

VrfId

Specifies the VRF ID of the IPv6 unicast FIB entry, 0 indicates NRE.

DestinationIpAddrType

Specifies the address type of the destination IPv6 address.

DestinationIpAddr

Specifies the destination IPv6 Address of the IPv6 unicast FIB entry.

DestinationMask

Specifies the destination IPv6 mask of the IPv6 unicast FIB entry

NextHopBmac

Specifies the nexthop B-MAC of the IPv6 unicast FIB entry.

DestIsid

Specifies the destination I-SID of the IPv6 unicast FIB entry.

Vlan

Specifies the VLAN of the IPv6 unicast FIB entry.

Isid

Specifies the I-SID of the IPv6 unicast FIB entry.

NextHopName

Specifies the nexthop hostname of the IPv6 unicast FIB entry.

OutgoingPort

Specifies the outgoing port of the IPv6 unicast FIB entry.

PrefixCost

Specifies the prefix cost of the IPv6 unicast FIB entry.

SpbmCost

Specifies the B-MAC cost of the IPv6 unicast FIB entry.

MetricType

Specifies the Metric Type of the IPv6 unicast FIB entry.