R211x-HP Flexfabric 11900 TRILL Configuration Guide

Step Command Remarks

6. Configure the CSNP

interval.

trill timer csnp interval The default setting is 10 seconds.

Adjusting LSP parameters

You can modify the following LSP parameters:

• LSP maximum age—An LSP originated by an RB uses the maximum age as the remaining lifetime.

When the remaining lifetime of an LSP in the LSDB is 0 seconds, the RB removes the LSP's content,

keeps the LSP's digest, and purges the LSP from the network by advertising the LSP that has the

remaining lifetime set to 0.

• LSP refresh interval—When the remaining lifetime of a locally originated LSP is no greater than

(maximum age – refresh interval), the LSP is refreshed even if no change occurs to it. This

mechanism avoids frequent LSP aging and ensures network stability.

• Maximum length of an LSP originated by an RB—The actual maximum LSP length is determined by

the smallest of following values:

{ The configured value.

{ The interface MTU.

{ The maximum length of an LSP originated by an RB (which is carried in LSPs).

• Maximum length of an LSP that can be received by an RB—When the RB receives an LSP

exceeding the length, the RB drops the LSP.

• Overload bit of LSPs—When the Overload bit in the LSPs sent by an RB is set, the RB fails and

cannot correctly perform route selection and packet forwarding. When the RB cannot record the

complete LSDB because of insufficient memory, routing calculation errors occur. To make

troubleshooting easier, temporarily exclude the RB from the TRILL network by setting the Overload

bit for the LSPs sent by the failed RB.

• Minimum LSP interval and maximum number of LSPs transmitted per time—To avoid frequent LSP

aging in the network, RBs periodically advertise LSPs. The actual refresh interval of an LSP is

determined by both the minimum LSP interval and the maximum number of LSPs transmitted per time.

To prevent LSPs from being aged out accidentally, set the LSP maximum age and the LSP refresh

interval appropriately.

To adjust LSP-related parameters:

Step Command Remarks

1. Enter system view.

system-view

N/A

2. Enter TRILL view.

trill N/A

3. Set the LSP maximum

age.

timer lsp-max-age time The default setting is 1200 seconds.

4. Set the LSP refresh

interval.

timer lsp-refresh time The default setting is 900 seconds.