C

Routes directly connected to the local device that were not distributed via IGP. The device inherently knows of these networks, so there is no need to learn about these from another device.

Connected routes are preferred over routes for the same network learned from other routing protocols.

E

External.

L1

IS-IS level-1.

L2

IS-IS level-2.

ia

IS-IS inter area (leaked).

D

Discard route. A device performing summarization installs a discard route in its routing table for the summarized network range to prevent routing loops where portions of the summarized network range do not have a more specific route in the RIB.

External and internal discard route entries are installed by default. During route summarization, routing loops can happen if data sent to a nonexisting network appears to be a part of the summary, and the router doing the summarization has a less specific route that points back to the sending router for the network.

e

External metric. Routes can be redistributed into IS-IS with either internal or external metrics (internal is the default). The metric type determines the base metric value of the redistributed routes. The value of an internal metric is lower than 64. The value of an external metric is 64-128.

Code

As explained in Table 3-75.

Tag

Name that identifies the IS-IS area.

VRF

VRF name.

Destination

IP address.

Metric

Tunnel metric.

Tunnel-ID

Tunnel identifier.

Tunnel-End-Point

Tunnel endpoint address.