Improving the Maintainability of IS-IS

The administrator can improve the maintainability of IS-IS using either of the following methods:

Configuring IS-IS host name mapping: Through this function, the administrator can use a simple name to replace the system ID. After IS-IS host name mapping is configured, the dynamic name is displayed in the IS-IS information to replace the system ID when the display command is executed. This improves the maintainability of IS-IS networks.
Configuring IS-IS to add the POI TLV to a PURGE packet: When the value of the Remaining Lifetime field in an LSP packet is 0, this packet is invalid and called a PURGE packet. PURGE packets do not record information about the devices generating these packets. Therefore, when a network is faulty, the packet source cannot be located. To solve this problem, IS-IS can be configured to add the POI TLV to a PURGE packet so that the PURGE packet contains information about its generating device. If the dynamic host name function is configured locally, the host name TLV is also added to the PURGE packet to facilitate fault location.