Reference 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.
S4820T
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)
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version 9.0.2.0 Introduced on the S6000.
Version
8.3.19.0
Introduced on the S4820T.
Version
8.3.12.0
Introduced on the S4810.
Version 8.3.11.1 Introduced on the Z9000.
Version 7.8.1.0 Added support for multi-topology ISIS.
Version 6.3.1.0 Introduced.
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.
Intermediate System to Intermediate System (IS-IS)
1011