Monitoring And Maintaining Is-Is - Cisco Catalyst 9500 series Configuration Manual

Monitoring and Maintaining IS-IS

Monitoring and Maintaining IS-IS
You can display specific IS-IS statistics, such as the contents of routing tables, caches, and databases. You
can also display information about specific interfaces, filters, or neighbors.
The following table lists the privileged EXEC commands for clearing and displaying IS-IS routing. For
explanations of the display fields, see the use the Cisco IOS command reference master index, or search online.
Table 17: IS-IS Show Commands
Command
show ip route isis
show isis database
show isis routes
show isis spf-log
show isis topology
show route-map
trace clns destination
Information About Multi-VRF CE
Virtual Private Networks (VPNs) provide a secure way for customers to share bandwidth over an ISP backbone
network. A VPN is a collection of sites sharing a common routing table. A customer site is connected to the
service-provider network by one or more interfaces, and the service provider associates each interface with
a VPN routing table, called a VPN routing/forwarding (VRF) table.
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
158
Configuring IP Unicast Routing
Purpose
Displays the current state of
the ISIS IP routing table.
Displays the IS-IS link-state
database.
Displays the IS-IS Level 1
routing table.
Displays a history of the
shortest path first (SPF)
calculations for IS-IS.
Displays a list of all
connected routers in all areas.
Displays all route maps
configured or only the one
specified.
Discover the paths taken to a
specified destination by
packets in the network.