3com S7906E Manuel De Montage

 

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A router running IS-IS cannot redistribute any default route and thus cannot advertise a default route to 

other neighbors. You can use the following commands to advertise a default route of 0.0.0.0/0 to the 

same level neighbors. 

Follow these steps to advertise a default route: 

Enter system view 

–– 

Enter IS-IS view 

isis [ process-id ] [ vpn-instance 
vpn-instance-name ] 

— 

Advertise a default 
route 

default-route-advertise [ route-policy 
route-policy-name | [ level-1 | level-1-2 | 
level-2 ] ] * 

Required 

The function is disabled by 
default. 

 

The default route is only advertised to routers at the same level. You can use a routing policy to 

generate the default route only when a local routing entry is matched by the policy. 

 

Redistribution of large numbers of routes on a device may affect the performance of other devices in the 

network. In that case, you can configure a limit on the number of redistributed routes to limit the number 

of routes to be advertised.  

Follow these steps to configure IS-IS route redistribution from other routing protocols: 

Enter system view 

Enter IS-IS view 

isis [ process-id ] [ vpn-instance 
vpn-instance-name ] 

Redistribute routes 
from another routing 
protocol 

import-route protocol [ process-id | 
all-processes | allow-ibgp ] [ cost cost | 
cost-type { external | internal } | 
[ level-1 | level-1-2 | level-2 ] | 
route-policy route-policy-name | tag 
tag ] * 

Required 

No route is redistributed by 
default. 

If no level is specified, routes 
are redistributed into the 
Level-2 routing table by default.

Configure the 
maximum number of 
redistributed Level 
1/Level 2 IPv4 routes  

import-route limit number  

Optional  

The default value depends on 
the SRPU models, LPU 
models, and their working 
modes.