View Cached Destination Information

Before you begin

Change the VRF instance as required to view cached destination information on a specific VRF instance. Not all parameters are configurable on non-default VRFs.

About this task

Perform this procedure to view the next-hop addresses in the destinations cache.

The destination cache updates or populates when IPv6 packets locally originate on the central processor of the switch. The main purpose of the destination cache is to store, on a per-destination basis, the dynamic Path MTU value currently used when transmitting packets from the local system to the remote destination. The Path MTU value itself is used to calculate how many bytes can fit into an individual packet before fragmentation should be applied.

Procedure

  1. In the navigation pane, expand Configuration > IPv6.
  2. Select IPv6.
  3. Select the Destination Cache tab.

Destination Cache Field Descriptions

Use the data in the following table to use the Destination Cache tab.

Name

Description

DestAddr

Shows the IPv6 destination address.

Interface

Shows the interface number that is used to reach the destination.

NextHop

Shows the IPv6 address for the next hop to the destination.

IfType

Specifies the interface type (tunel, VLAN, or brouter) or virtual circuit (VRRP, RSMLT).

IfData

Displays additional information about virtual circuits. For instance, for a VRRP or RSMLT the virtual router ID displays. If the interface type is tunnel, VLAN, or brouter, no additional information displays.

Pmtu

Shows the path maximum transmission unit (MTU) for the destination.

PmtuAge

Shows the time, in seconds, since an ICMPv6 packet too big message was received.