R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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Because the RP-set information contained in each segment is different, loss of some IP fragments will not
result in dropping of the entire message.
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.
The function of BSM semantic fragmentation is enabled by default. Devices not supporting this function
might deem a fragment as an entire message, thus learning only part of the RP-set information. Therefore,
if such devices exist in the IPv6 BIDIR-PIM domain, you need to disable the semantic fragmentation
function on the C-BSRs.
To disable the BSM semantic fragmentation function:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter IPv6 PIM view.
pim ipv6 N/A
3. Disable the BSM semantic
fragmentation function.
undo bsm-fragment enable
By default, the BSM semantic
fragmentation function is enabled.
Configuring IPv6 administrative scoping
When administrative scoping is 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 divide
the IPv6 BIDIR-PIM domain into multiple admin-scoped zones. Each admin-scoped zone maintains a BSR,
which serves a specific multicast group range. The global-scoped zone also maintains a BSR, which
serves all the rest multicast groups.
Enabling IPv6 administrative scoping
Before you configure an IPv6 admin-scoped zone, you must enable IPv6 administrative scoping first.
Perform the following configuration on all routers in the IPv6 PIM-SM domain.
To enable IPv6 administrative scoping:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter IPv6 PIM view.
pim ipv6 N/A
3. Enable IPv6 administrative
scoping.
c-bsr admin-scope Disabled by default.
Configuring an IPv6 admin-scoped zone boundary
The boundary of each IPv6 admin-scoped zone is formed by ZBRs. Each admin-scoped 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-scoped zone
boundary.
Perform the following configuration on routers that you want to configure as a ZBR.
To configure an admin-scoped zone boundary: