Displaying And Maintaining Is-Is Configuration - 3Com MSR 50 Series Configuration Manual

Displaying and
Maintaining IS-IS
Configuration
The Graceful Restart interval on a router is used as the holdtime in the IS-IS Hello
PDUs so that its neighbors can maintain the adjacencies within the interval after
the router restarts.
By setting the SA (Suppress-Advertisement) bit in the hello PDUs sent by the GR
Restarter, its neighbors will not advertise adjacencies within the specified period
until the completion of LSDB synchronization between the GR Restarter and its
neighbors. This feature helps to effectively avoid blackhole routes due to the
sending or receiving of LSPs across the restart.
n
A device can act as both a GR Restarter and GR Helper at the same time.
Follow these steps to configure GR on the GR Restarter and GR Helper
respectively:
To do...
Enter system view
Enable IS-IS, and enter IS-IS
view
Enable the GR capability for
IS-IS
Set the Graceful Restart
interval
Configure to set the SA bit
during restart
To do...
Display brief IS-IS information display isis brief [ process-id |
Display the status of the
debug switch
Display information about
IS-IS enabled interfaces
Display IS-IS license
information
Display IS-IS LSDB information display isis lsdb [ [ l1 | l2 | level-1 |
Display IS-IS mesh group
information
Display the
host-name-to-system-ID
mapping table

Displaying and Maintaining IS-IS Configuration

Use the command...
system-view
isis [ process-id ]
[ vpn-instance
vpn-instance-name ]
graceful-restart
graceful-restart interval
timer
graceful-restart
suppress-sa
Use the command...
vpn-instance vpn-instance-name ]
display isis debug-switches
{ process-id | vpn-instance
vpn-instance-name }
display isis interface [ [ traffic-eng |
verbose ] * | tunnel ] [ process-id |
vpn-instance vpn-instance-name ]
display isis license
level-2 ] | [ lsp-id LSPID | lsp-name
lspname ] | local | verbose ] *
[ process-id | vpn-instance
vpn-instance-name ]
display isis mesh-group [ process-id
| vpn-instance vpn-instance-name ]
display isis name-table [ process-id |
vpn-instance vpn-instance-name ]
905
Remarks
-
Required
Disabled by default
Required
Disabled by default
Required
300 seconds by default
Optional
By default, the SA bit is not
set.
Remarks
Available in any view
Available in any view
Available in any view
Available in any view
Available in any view
Available in any view
Available in any view