3com S7906E Installationsanweisungen

 

1-6 

A static route is a manually configured route. With a static route configured, packets to the specified 

destination are forwarded through the path specified by the administrator. 

The disadvantage of using static routes is that they cannot adapt to network topology changes. If a fault 

or a topological change occurs in the network, the routes will be unreachable and the network breaks. 

To prevent this problem, you can configure another route to back up the static route. When the static 

route is reachable, packets are forwarded through the static route; when the static route is unreachable, 

packets are forwarded through the backup route, thus avoiding network break and enhancing network 

reliability. 

You can check the reachability of a static route in real time by establishing collaboration between Track 

and static routing.  

If you specify the next hop but not the egress interface when configuring a static route, you can 

establish collaborations among the static route, the track module, and detection modules, and thus 

check the reachability of the static route according to the status of the track entry.  

z 

If the status of the track entry is Positive, then the next hop of the static route is reachable, and the 

configured static route is valid. 

z 

If the status of the track entry is Negative, then the next hop of the static route is unreachable, and 

the configured static route is invalid. 

Follow these steps to configure the Track-Static Routing collaboration: 

Enter system view 

— 

ip route-static dest-address 
{ mask | mask-length } 
{ next-hop-address | 
vpn-instance 
d-vpn-instance-name 
next-hop-address } track 
track-entry-number 
[ preference preference-value ] 
[ tag tag-value ] [ description 
description-text ] 

Configure the Track-Static 
Routing collaboration, so as to 
check the reachability of the 
next hop of the static route 

ip route-static vpn-instance 
s-vpn-instance-name&<1-6> 
dest-address { mask | 
mask-length } 
{ next-hop-address track 
track-entry-number [ public ] | 
vpn-instance 
d-vpn-instance-name 
next-hop-address track 
track-entry-number } 
[ preference preference-value ] 
[ tag tag-value ] [ description 
description-text ] 

Required 

Use either command. 

Not configured by default.