H3C Technologies H3C S10500 Series Switches - Manual (Page 407)

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NOTE:
Generally, a BSR performs BSM semantic fragmentation according to the MTU of its BSR interface.
However, the semantic fragmentation of BSMs originated due to learning of a new PIM neighbor is
performed according to the MTU of the outgoing interface.
Configuring IPv6 administrative scoping
With administrative scoping disabled, an IPv6 BIDIR-PIM domain has only one BSR. The BSR manages
the whole network. To manage your network more effectively and specifically, you can partition the IPv6
BIDIR-PIM domain into multiple admin-scope zones. Each admin-scope zone maintains a BSR, which
serves a specific multicast group range. The global scope zone also maintains a BSR, which serves all the
rest multicast groups.
Enabling IPv6 administrative scoping
Before you configure an IPv6 admin-scope zone, you must enable IPv6 administrative scoping first.
Perform the following configuration on all routers in the IPv6 PIM-SM domain.
Follow these steps to enable IPv6 administrative scoping:
To do… Use the command… Remarks
Enter system view system-view —
Enter IPv6 PIM view pim ipv6 —
Enable IPv6 administrative
scoping
c-bsr admin-scope
Required
Disabled by default
Configuring an IPv6 admin-scope zone boundary
The boundary of each IPv6 admin-scope zone is formed by ZBRs. Each admin-scope zone maintains a
BSR, which serves a specific IPv6 multicast group range. IPv6 multicast packets (such as assert messages
and bootstrap messages) that belong to this range cannot cross the admin-scope zone boundary.
Perform the following configuration on routers that you want to configure as a ZBR.
Follow these steps to configure an admin-scope zone boundary:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view interface interface-type interface-number —
Configure an IPv6 multicast
forwarding boundary
multicast ipv6 boundary
{ ipv6-group-address prefix-length | scope
{ scope-id | admin-local | global |
organization-local | site-local } }
Required
By default, no IPv6 multicast
forwarding boundary is
configured.
NOTE:
For more information about the multicast ipv6 boundary command, see IP Multicast Command
Reference.