D-Link DGS-3630-52PC Quick installation Guide - Page 405

DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide Parameter Hostname Dynamic Ignore LSP Errors IS Type LSP Generation Interval Level-1 LSP Generation Interval Level-2 LSP Refresh Interval Description • Validate - Specifies to insert the password into the SNPs and check the password in SNPs on receiving. • Send Only - Specifies to only insert the password into the SNPs, but not check the password in SNPs on receiving. Select the Default option to use the default settings. Select to enable or disable the dynamic hostname feature here. This is used to enable ISIS dynamic hostname mapping. The dynamic hostname mechanism uses Link-State Protocol (LSP) flooding to distribute the router-name-to-system-ID mapping information across the entire network. Every router on the network will try to install the system ID-to-router name mapping information in its routing table. If a router that has been advertising the dynamic name Type, Length, Value (TLV) on the network suddenly stops the advertisement, the mapping information last received will remain in the dynamic host mapping table for up to one hour, allowing the network administrator to display the entries in the mapping entry table during a time when the network experiences problems. Select to enable or disable the ignore LSP error feature. This is used to enable the ignoring of link-state packets (LSPs) with bad checksums. The ISIS protocol definition requires that a received LSP with an incorrect datalink checksum be purged by the receiver, which causes the initiator of the packet to regenerate it. However, if a network has a link that causes data corruption and at the same time is delivering LSPs with correct data-link checksums, a continuous cycle of purging and regenerating large numbers of packets can occur. Because this situation could render the network non-functional, use this command to ignore these LSPs rather than purge the packets. Select the IS type here. This is used to configure the routing level for an instance of the ISIS routing process. Options to choose from are: • Level-1 - Specifies to perform only Level 1 routing. The Switch will learn only about destinations inside its area. Level 2 routing is performed by the closest Level 1-2 router. • Level-1-2 - Specifies to perform both Level 1 and Level 2 routing. • Level-2 - Specifies to perform only Level 2 routing. Enter the LSP generation interval level-1 value here. This is used to configure the interval of link-state packet generation in level 1 areas only. Use this to reduce the rate of LSP generation during periods of instability in the network. This can help to reduce CPU load on the router and to reduce the number of LSP transmissions to ISIS neighbors. The range is from 1 to 120 seconds. Select the Default option to use the default value. Enter the LSP generation interval level-2 value here. This is used to configure the interval of link-state packet generation in level 2 areas only. Use this to reduce the rate of LSP generation during periods of instability in the network. This can help to reduce CPU load on the router and to reduce the number of LSP transmissions to ISIS neighbors. The range is from 1 to 120 seconds. Select the Default option to use the default value. Enter the LSP refresh interval value here. This is used to configure the interval of link-state packet regeneration. LSPs must be periodically refreshed before their lifetimes expire. The value configured here should be less than the value configured using the Max LSP Lifetime parameter; otherwise, LSPs will time out before they are refreshed. Misconfiguring the LSP lifetime to be too low compared to the LSP refresh interval, will result in the software reducing the LSP refresh interval to prevent the LSPs from timing out. 393