CLI Guide

You can configure only one IS-IS routing process to perform Level 2 routing. A
level-1-2 designation performs Level 1 and Level 2 routing at the same time.
Related
Commands
• ip router isis — configures IS-IS routing processes for IP on interfaces and
attaches an area designator to the routing process.
• net — configures an IS-IS network entity title (NET) for a routing process.
• is-type — assigns a type for a given area.
set-overload-bit
To set the overload bit in its non-pseudonode LSPs, configure the router. This setting prevents other
routers from using it as an intermediate hop in their shortest path first (SPF) calculations.
Syntax
set-overload-bit
To return to the default values, use the no set-overload-bit command.
Defaults Not set.
Command Modes
• ROUTER ISIS (for IPv4)
• CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
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 Set the overload bit when a router experiences problems, such as a memory
shortage due to an incomplete link state database which can result in an
incomplete or inaccurate routing table. If you set the overload bit in its LSPs, other
routers ignore the unreliable router in their SPF calculations until the router has
recovered.
show config
Display the changes you made to the IS-IS configuration. Default values are not shown.
Syntax
show config
Command Modes
• ROUTER ISIS (for IPv4)
926
Intermediate System to Intermediate System (IS-IS)