supernet label-route advertise

Function

The supernet label-route advertise disable command disables a BGP device from advertising BGP supernet labeled routes.

The undo supernet label-route advertise disable or supernet label-route advertise enable command restores the default configuration.

By default, BGP supernet labeled routes can be preferentially selected and advertised.

Format

supernet label-route advertise disable

supernet label-route advertise enable

undo supernet label-route advertise disable

Parameters

None

Views

BGP view, BGP-IPv4 unicast address family view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

A BGP supernet route has the same destination address and next hop address or has a more detailed destination address than the next hop address. Any route that meets one of the following conditions is a BGP supernet route.

If you perform bitwise AND operations on the destination address mask with the destination address and next hop address, respectively, the calculated network addresses are the same, and the destination address mask is greater than or equal to the next hop address mask.
If you perform bitwise AND operations on the destination address mask with the destination address and next hop address, respectively, the calculated network addresses are different. However, if you perform bitwise AND operations on the next hop address mask with the destination address and next hop address, respectively, the calculated network addresses are the same.

For example, the route destined for 10.6.6.6 in the following command output is a BGP supernet route.

<HUAWEI> display bgp routing-table
 BGP Local router ID is 10.1.1.2
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete

 Total Number of Routes: 1
        Network            NextHop        MED        LocPrf    PrefVal Path/Ogn
   *>i  10.6.6.6/32        10.6.6.6       0          100       0       ?

Example

# Disable a BGP device from advertising BGP supernet labeled routes.

<HUAWEI> system-view
[HUAWEI] bgp 100
[HUAWEI-bgp] ipv4-family unicast
[HUAWEI-bgp-af-ipv4] supernet label-route advertise disable