Setting The Lsdb Overload Bit; Configuring System Id To Host Name Mappings - HPE FlexNetwork HSR6800 Configuration Manual

Step
Assign a high priority to IS-IS
3.
routes.

Setting the LSDB overload bit

By setting the overload bit in sent LSPs, a router informs other routers of a failure that makes it
incapable of routing and forwarding packets.
When an IS-IS router cannot record the complete LSDB due to running out of memory or some other
reasons, 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
Enter system view.
1.
Enter IS-IS view.
2.
Set the overload bit.
3.

Configuring system ID to host name mappings

In IS-IS, a system ID identifies a router or host uniquely. A system ID has a fixed length of 6 bytes.
When an administrator needs to view IS-IS neighbor information, routing table, or LSDB information,
using the system IDs in dotted decimal notation is not convenient. To solve it, configure the mappings
between system IDs and host names, as host names are easier to remember and use.
Such mappings can be configured manually or dynamically. Note the following:
•
When you use the display isis lsdb command on a router configured with dynamic system ID
to host name mapping, router names rather than system IDs are displayed.
•
If you configure both dynamic and static system ID to host name mappings on a router, the host
name for dynamic system ID to host name mapping applies.
Configuring a static system ID to host name mapping
To configure a static system ID to host name mapping:
Step
Enter system view.
1.
Enter IS-IS view.
2.
Configure a system ID to
3.
host name mapping for a
remote IS.
Command
priority high { ip-prefix
prefix-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 ]
is-name map sys-id
map-sys-name
146
Remarks
Optional.
Not assigned by default.
If no IS-IS route is assigned a high
priority, IS-IS host routes are
processed first in network
convergence because they have
higher priority than other types of
IS-IS routes.
Remarks
N/A
N/A
Not set by default.
Remarks
N/A
N/A
A system ID can only correspond
to a host name.