Cisco NCS 5500 Series Configuration Guides

The IS-IS overload bit avoidance feature does not change the default behavior on nodes that have their overload
bit set if those nodes are not included in the path calculation (PCALC).
Note
The IS-IS overload bit avoidance feature is activated using the following command:
mpls traffic-eng path-selection ignore overload
The IS-IS overload bit avoidance feature is deactivated using the no form of this command:
no mpls traffic-eng path-selection ignore overload
When the IS-IS overload bit avoidance feature is deactivated, nodes with the overload bit set cannot be used
as nodes of last resort.
Configure IS-IS Overload Bit Avoidance
This task describes how to activate IS-IS overload bit avoidance.
Before you begin
The IS-IS overload bit avoidance feature is valid only on networks that support the following features:
• MPLS
• IS-IS
SUMMARY STEPS
1. configure
2. mpls traffic-eng path-selection ignore overload
DETAILED STEPS
Step 1 configure
Step 2 mpls traffic-eng path-selection ignore overload
Example:
RP/0/RP0/CPU0:router(config)# mpls traffic-eng path-selection ignore overload
Activates IS-IS overload bit avoidance.
Configuring IS-IS Overload Bit Avoidance: Example
The following example shows how to activate IS-IS overload bit avoidance:
config
mpls traffic-eng path-selection ignore overload
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
38
Implementing IS-IS
Configure IS-IS Overload Bit Avoidance

Cisco NCS 5500 Series Specifications

General

Series	NCS 5500
Category	Network Router
Operating System	Cisco IOS XR
Product Type	Modular Router
Form Factor	Rack-mountable
Purpose	High-performance routing for service providers and large enterprises
Interface Types	Ethernet
Redundancy	Redundant power supplies and fan trays
Port Density	Varies by model; high-density configurations available
Routing Protocols	BGP, OSPF, IS-IS, MPLS
Power Supply Options	AC and DC power supplies available
Management	CLI, SNMP, NETCONF