Concept Guide

password Enter an alphanumeric string up to 16 characters long. If you do not specify an
encryption type or hmac-md5 keywords, the password is processed as plain text
which provides limited security.
Defaults No default password.
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information The domain password is inserted in Level 2 link state PDUs (LSPs), complete sequence number PDUs (CSNPs),
and partial sequence number PDUs (PSNPs).
Related Commands
• area-password — congures an IS-IS area authentication password.
• isis priority — congures the authentication password for an interface.
graceful-restart ietf
Enable graceful restart on an IS-IS router.
Syntax
graceful-restart ietf
To return to the default, use the no graceful-restart ietf command.
Parameters
ietf Enter ietf to enable graceful restart on the IS-IS router.
Defaults Graceful restart disabled.
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
Every graceful restart enabled router’s HELLO PDUs includes a restart TLV. This restart enables (re)starting as well
as the existing ISIS peers to detect the GR capability of the routers on the connected network. A ag in the
Restart TLV contains restart request (RR), restart acknowledge (RA) and suppress adjacency advertisement (SA)
bit ags.
The ISIS graceful restart-enabled router can co-exist in mixed topologies where some routers are graceful restart-
enabled and others are not. For neighbors that are not graceful restart-enabled, the restarting router brings up the
adjacency per the usual methods.
Intermediate System to Intermediate System (IS-IS) 779