Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 549
Configuring Multi-Topology IS-IS MT IS-IS, Configuring IS-IS Graceful Restart
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IS-IS: LSP authentication failures : 0 Dell# You can assign more NET addresses, but the System ID portion of the NET address must remain the same. The system supports up to six area addresses. Some address considerations are: • In order to be neighbors, configure Level 1 routers with at least one common area address. • A Level 2 router becomes a neighbor with another Level 2 router regardless of the area address configured. However, if the area addresses are different, the link between the Level 2 routers is only at Level 2. Configuring Multi-Topology IS-IS (MT IS-IS) To configure multi-topology IS-IS (MT IS-IS), use the following commands. 1. Enable multi-topology IS-IS for IPv6. ROUTER ISIS AF IPV6 mode multi-topology [transition] Enter the keyword transition to allow an IS-IS IPv6 user to continue to use single-topology mode while upgrading to multi-topology mode. After every router has been configured with the transition keyword, and all the routers are in MT IS-IS IPv6 mode, you can remove the transition keyword on each router. NOTE: When you do not enable transition mode, you do not have IPv6 connectivity between routers operating in single-topology mode and routers operating in multi-topology mode. 2. Exclude this router from other router's SPF calculations. ROUTER ISIS AF IPV6 mode set-overload-bit 3. Set the minimum interval between SPF calculations. ROUTER ISIS AF IPV6 mode spf-interval [level-l | level-2 | interval] [initial_wait_interval [second_wait_interval]] Use this command for IPv6 route computation only when you enable multi-topology. If using singletopology mode, to apply to both IPv4 and IPv6 route computations, use the spf-interval command in CONFIG ROUTER ISIS mode. 4. Implement a wide metric-style globally. ROUTER ISIS AF IPV6 mode isis ipv6 metric metric-value [level-1 | level-2 | level-1-2] To configure wide or wide transition metric style, the cost can be between 0 and 16,777,215. Configuring IS-IS Graceful Restart To enable IS-IS graceful restart globally, use the following commands. Also, you can implement optional commands to enable the graceful restart settings. Intermediate System to Intermediate System 549
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