Configuring Ipv6 Administrative Scoping - HP A6600 Configuration Manual

Make sure that the BS period value is smaller than the BS timeout value.
The BS period defaults to the value determined by the formula:
BS period = (BS timeout – 10) / 2
The default BS timeout is 130 seconds, so the default BS period = (130 – 10) / 2 = 60 (seconds)
The BS timeout setting defaults to the value determined by the formula:
BS timeout = BS period × 2 + 10
The default BS period is 60 seconds, so the default BS timeout = 60 × 2 + 10 = 130 (seconds)
Disabling BSM semantic fragmentation
Generally, a BSR periodically distributes the RP-set information in bootstrap messages within the IPv6
PIM-SM domain. It encapsulates a BSM in an IPv6 datagram and might split the datagram into fragments
if the message exceeds the MTU. In respect of such IP fragmentation, loss of a single IP fragment leads to
unavailability of the entire message.
Semantic fragmentation of BSMs can solve this issue. When a BSM exceeds the MTU, it is split to multiple
bootstrap message fragments (BSMFs).
After receiving a BSMF that contains the RP-set information of one group range, a non-BSR router
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updates corresponding RP-set information directly.
If the RP-set information of one group range is carried in multiple BSMFs, a non-BSR router updates
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corresponding RP-set information after receiving all these BSMFs.
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.
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 PIM-SM domain, you need to disable the semantic fragmentation function
on the C-BSRs.
To do...
1. Enter system view.
2. Enter IPv6 PIM view.
3. Disable the BSM semantic
fragmentation function.
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 IPv6 PIM neighbor is
performed according to the MTU of the outgoing interface.

Configuring IPv6 administrative scoping

With IPv6 administrative scoping disabled, an IPv6 PIM-SM domain has only one BSR. The BSR manages
the whole network. To manage your network more effectively and specifically, you can partition the IPv6
PIM-SM domain into multiple IPv6 admin-scope zones. Each IPv6 admin-scope zone maintains a BSR,
which serves a specific IPv6 multicast group range. The IPv6 global scope zone also maintains a BSR,
which serves the IPv6 multicast groups with the Scope field in the group addresses being 14.
Use the command...
system-view
pim ipv6
undo bsm-fragment enable
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Remarks
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Required.
By default, the BSM semantic
fragmentation function is enabled.