c-bsr admin-scope

Function

The c-bsr admin-scope command enables the bootstrap router (BSR) administrative domain function in a PIM-SM domain.

The undo c-bsr admin-scope command restores the default configuration.

By default, the BSR administrative domain function is disabled, so that a PIM-SM domain has only one BSR to serve all routers in the entire domain.

Format

c-bsr admin-scope

undo c-bsr admin-scope

Parameters

None

Views

VPN instance PIM view, PIM view of a public network instance

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
pim	write

Usage Guidelines

Usage Scenario

By default, each PIM-SM domain has only one BSR to serve all routers in the entire PIM-SM domain. To implement better device management, run the c-bsr admin-scope command to enable the BSR administrative domain function, so that a PIM-SM domain can be divided into one global domain and multiple BSR administrative domains. This function can therefore reduce the workload of a single BSR and provide dedicated services for users in a specific domain using private group addresses.

Each BSR administrative domain maintains a BSR, serving the multicast groups on the network segment 239.0.0.0/8. Multicast packets for groups on this network segment cannot go across a BSR administrative domain border. Multicast groups that do not belong to any BSR administrative domain belong to the global domain. The global domain maintains a BSR, serving all other multicast groups not on the network segment 239.0.0.0/8.

Similar to VPN in unicast, a BSR administrative domain can be regarded as a VPN, and the multicast address segment 239.0.0.0/8 can be regarded as the unicast address segment 10.0.0.0/8. Other multicast group addresses can be all used on the public network; therefore, address collision must be prevented. However, a same multicast group address can be assigned to different BSR administrative domains.

Prerequisites

The multicast routing function has been enabled using the multicast routing-enable command in the public network instance view or VPN instance view.

Configuration Impact

After the undo pim command or the undo multicast routing-enable command is run in the system view, the BSR administrative domain function is automatically disabled.

Precautions

To implement the BSR administrative domain function, you must run the c-bsr admin-scope command on all routers in a PIM-SM domain.

Example

# In the public network instance, enable the BSR administrative domain function in a PIM-SM domain.

<HUAWEI> system-view
[~HUAWEI] multicast routing-enable
[*HUAWEI] pim
[*HUAWEI-pim] c-bsr admin-scope