Feature |
Product |
Release introduced |
---|---|---|
For configuration details, see VOSS User Guide. |
||
Alternative routes for IPv4 |
5520 Series |
VOSS 8.2.5 |
VSP 4450 Series |
VSP 4000 4.0 |
|
VSP 4900 Series |
VOSS 8.1 |
|
VSP 7200 Series |
VOSS 4.2.1 |
|
VSP 7400 Series |
VOSS 8.0 |
|
VSP 8200 Series |
VSP 8200 4.0 |
|
VSP 8400 Series |
VOSS 4.2 |
|
VSP 8600 Series |
VSP 8600 4.5 |
|
XA1400 Series |
VOSS 8.0.50 |
|
Alternative routes for IPv6 |
5520 Series |
VOSS 8.2.5 |
VSP 4450 Series |
VOSS 5.1 |
|
VSP 4900 Series |
VOSS 8.1 |
|
VSP 7200 Series |
VOSS 5.1 |
|
VSP 7400 Series |
VOSS 8.0 |
|
VSP 8200 Series |
VOSS 5.1 |
|
VSP 8400 Series |
VOSS 5.1 |
|
VSP 8600 Series |
VSP 8600 6.2 |
|
XA1400 Series |
Not Supported |
To avoid traffic interruption, you can globally enable the alternative routes feature so the router can use the next-best route, also known as an alternative route, if the best route becomes unavailable.
Routers learn routes to a destination through routing protocols. Routers maintain a routing table of the learned alternative routes sorted in order by route preference, route costs, and route sources. The first route on the list is the best route and the route that the router prefers to use.
The alternative route concept also applies between routing protocols. For example, if an OSPFv3 route becomes unavailable and an alternative RIPng route is available, the system activates the RIPng route without waiting for the update interval to expire.