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HP 5500 EI series Configuration Manual: Setting The Lsdb Overload Bit; Configuring System Id To Host Name Mappings

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Step
1.
Enter system view.
2.
Enter IS-IS view.
3.
Assign convergence priorities
to specific IS-IS routes.

Setting the LSDB overload bit

By setting the overload bit in sent LSPs, a router informs other routers of failures that make it unable to
select routes and forward packets.
When an IS-IS router cannot record the complete LSDB, for example, because of memory insufficiency,
it will calculate wrong routes. To make troubleshooting easier, temporarily isolate the router from the IS-IS
network by setting the overload bit.
To set the LSDB overload bit:
Step
1.
Enter system view.
2.
Enter IS-IS view.
3.
Set the overload bit.
Configuring system ID to host name mappings
A 6-byte system ID in hexadecimal notation uniquely identifies a router or host in an IS-IS network. To
make a system ID easy to read, the system allows you to use host names to identify devices and provides
mappings between system IDs and host names.
The mappings can be configured manually or dynamically. Follow these guidelines when you configure
the mappings:
To view host names rather than system IDs by using the display isis lsdb command, you must enable
dynamic system ID to host name mapping.
If you configure both dynamic mapping and static mapping on a router, the host name specified for
dynamic mapping applies.
Configuring a static system ID to host name mapping
Step
1.
Enter system view.
2.
Enter IS-IS view.
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
priority { critical | high | medium }
{ prefix-list prefix-list-name | tag
tag-value }
Command
system-view
isis [ process-id ] [ vpn-instance vpn-instance-name ]
set-overload [ on-startup [ [ start-from-nbr system-id
[ timeout1 [ nbr-timeout ] ] ] | timeout2 ] [ allow { external
| interlevel } * ]
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
144
Remarks
N/A
N/A
By default, IS-IS routes, except IS-IS
host routes, have the low
convergence priority.
Remarks
N/A
N/A
By default, the
overload bit is not
set.
Remarks
N/A
N/A

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