HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Configuration Gu - Page 136
Command, Remarks, metric, system ID, or area ID is changed
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Each LSP has an age that decreases in the LSDB. IS-IS runs a process to delete any LSP with an age of 0 from the LSDB. You can adjust the age value based on the scale of a network. To specify the maximum age of LSPs: Step 1. Enter system view. 2. Enter IS-IS view. 3. Specify the maximum LSP age. Command system-view isis [ process-id ] [ vpn-instance vpn-instance-name ] timer lsp-max-age seconds Remarks N/A N/A The default setting is 1200 seconds. 2. Specify the LSP refresh interval and generation interval. Each router needs to refresh its LSPs at a configurable interval and send them to other routers to prevent valid routes from aging out. A smaller refresh interval speeds up network convergence but consumes more bandwidth. When the network topology changes, for example, a neighbor is down or up, or the interface metric, system ID, or area ID is changed, the router generates an LSP after a configurable interval. If such a change occurs frequently, excessive LSPs are generated, consuming a large amount of router resources and bandwidth. To solve the problem, you can adjust the LSP generation interval. When network changes are not frequent, the minimum-interval is adopted. If network changes become frequent, the LSP generation interval is incremented by incremental-interval × 2n-2 (n is the number of calculation times) each time a generation occurs until the maximum-interval is reached. To specify the LSP refresh interval and generation interval: Step 1. Enter system view. 2. Enter IS-IS view. 3. Specify the LSP refresh interval. Command system-view isis [ process-id ] [ vpn-instance vpn-instance-name ] timer lsp-refresh seconds 4. Specify the LSP generation interval. timer lsp-generation maximum-interval [ minimum-interval [ incremental-interval ] ] [ level-1 | level-2 ] Remarks N/A N/A By default, the LSP refresh interval is 900 seconds. By default: • The maximum interval is 2 seconds. • The minimum interval is 0 milliseconds. • The incremental interval is 0 milliseconds. 3. Specify LSP sending intervals. If a change occurs in the LSDB, IS-IS advertises the changed LSP to neighbors. You can specify the minimum interval for sending these LSPs to control the amount of LSPs on the network. To configure LSP sending intervals: Step 1. Enter system view. Command system-view Remarks N/A 125