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This chapter describes how to configure advanced FabricPath features, such as using the Intermediate System-to-Intermediate System (IS-IS) protocol on Cisco NX-OS 5500 Series switches.
This chapter includes the following sections:
Note For information about prerequisites, guidelines and limitations, and licensing requirements for FabricPath, see Chapter1, “Overview”
We recommend that you run the FabricPath network using the default Layer 2 IS-IS configurations.
However, you can change many of the IS-IS settings as follows:
If you change any of the FabricPath Layer 2 IS-IS settings, ensure that you make the same changes for those global parameters on every switch in the FabricPath network and for those parameters on every applicable FabricPath switch in the network.
Layer 2 IS-IS is based on Layer 3 IS-IS with enhancements to run on Layer 2. The commands for Layer 2 IS-IS and Layer 3 IS-IS are not the same. Layer 2 IS-IS is the control plane in FabricPath and a single protocol controls all unicast and multicast traffic. From a forwarding standpoint, FabricPath Layer 2 IS-IS forwards traffic for unicast, unknown unicast, broadcast, and multicast frames. Using Layer 2 IS-IS, the software maintains loop-free paths throughout the FabricPath network. (see “Configuring FabricPath Switching,” for information on default FabricPath Layer 2 IS-IS behavior and “Configuring FabricPath Forwarding,” for information on FabricPath forwarding.)
You can use these advanced FabricPath Layer 2 IS-IS configurations to fine-tune the operation of the FabricPath network.
Although the Layer 2 IS-IS protocol works automatically once you enable FabricPath, you can optionally configure parameters. Some FabricPath Layer 2 IS-IS parameters you configure globally and some you configure per switch. This section includes the following topics:
Although the FabricPath Layer 2 IS-IS protocol works automatically once you enable FabricPath, you can optionally configure the global parameters.
Note Graceful restart of IS-IS is not supported in Cisco 5500 Series Switches. While the graceful-restart command exists in the CLI, it is not supported at this time.
3. (Optional) authentication-check
4. (Optional) authentication key-chain auth-key-chain-name
5. (Optional) authentication type { cleartext | md5 }
6. (Optional) log-adjacency-changes
7. (Optional) lsp-gen-interval msecs [ msecs msecs ]
9. (Optional) max-lsp-lifetime secs
10. (Optional) maximum-paths max-paths
11. (Optional) reference-bandwidth { ref-mbps [Mbps] | ref-gbps [Gbps] }
12. (Optional) spf-interval msecs [ msecs msecs ]
13. (Optional) hostname dynamic
14. (Optional) root-priority value
See the Cisco Nexus 5000 Series NX-OS Unicast Routing Configuration Guide for more information on IS-IS commands.
Although the FabricPath Layer 2 IS-IS protocol works automatically once you enable FabricPath, you can optionally configure the interface parameters.
2. interface { ethernet mod/slot | port-channel channel-number }
3. (Optional) fabricpath isis authentication-check
4. (Optional) fabricpath isis authentication key-chain auth-key-chain-name
5. (Optional) fabricpath isis authentication type { cleartext | md5 }
6. (Optional) fabricpath isis csnp-interval seconds
7. (Optional) fabricpath isis hello-interval seconds
8. (Optional) fabricpath isis hello-multiplier multiplier
9. (Optional) fabricpath isis hello-padding
10. (Optional) fabricpath isis lsp-interval milliseconds
11. (Optional) fabricpath isis metric metric
12. (Optional) fabricpath isis retransmit-interval seconds
13. (Optional) fabricpath isis retransmit-throttle- interval milliseconds
14. (Optional) fabricpath topology topo-id
See the Cisco Nexus 5000 Series NX-OS Unicast Routing Configuration Guide and the Cisco Nexus 5000 Series NX-OS FabricPath Command Reference for more information on IS-IS commands.
Step 1 (Optional) clear fabricpath isis adjacency [* | system-id | interface {ethernet mod/slot | port-channel channel-number }]
Step 2 (Optional) clear fabricpath isis statistics *
Step 3 (Optional) clear fabricpath isis traffic [* | interface {ethernet mod/slot | port-channel channel-number }]
To display FabricPath information for advanced configurations perform one of the following tasks:
Table 5-1 lists the release history for these features.
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