3Com Switch 8800 Advanced Software V5 Configuration Guide

688 CHAPTER 46: IPV6 PIM CONFIGURATION
■ By default, the bootstrap timeout time is determined by this formula: Bootstrap
interval = (Bootstrap timeout - 10)
÷ 2. The default bootstrap timeout is 130
seconds, so the default bootstrap interval = (130 - 10)
÷ 2 = 60 (seconds).
■ If this parameter is manually configured, the system will use the configured
value.
c
CAUTION: In configuration, make sure that the bootstrap interval is smaller than
the bootstrap timeout time.
Configuring an RP An RP can be manually configured or dynamically elected through the BSR
mechanism. For a large IPv6 PIM network, static RP configuration is a tedious job.
Generally, static RP configuration is just a backup means for the dynamic RP
election mechanism to enhance the robustness and operation manageability of a
multicast network.
Configuring a static RP
If there is only one dynamic RP in a network, manually configuring a static RP can
avoid communication interruption due to single-point failures and avoid frequent
message exchange between C-RPs and the BSR. To enable a static RP to work
normally, you must perform this configuration on all the devices in the IPv6
PIM-SM domain and specify the same RP address.
Follow these steps to configure a static RP:
Configuring a C-RP
In an IPv6 PIM-SM domain, you can configure devices that intend to become the
RP into C-RPs. The BSR collects the C-RP information by receiving the C-RP-Adv
messages from C-RPs or auto-RP announcements from other devices and
organizes the information into to an RP-Set, which is flooded throughout the
entire network. Then, the other devices in the network calculate the mappings
between specific group ranges and the corresponding RPs based on the RP-Set.
We recommend that you configure C-RPs on backbone devices.
To guard again C-RP spoofing, you need to configure a legal C-RP address range
and the range of IPv6 multicast groups to be served on the BSR. In addition,
because every C-BSR has a chance to become the BSR, you need to configure the
same filtering policy on all C-BSRs.
Follow these steps to configure a C-RP:
To do... Use the command... Remarks
Enter system view system-view -
Enter IPv6 PIM view pim ipv6 -
Configure a static RP static-rp ipv6-rp-address [
acl6-number ] [ preferred ]
Optional
No static RP by default
To do... Use the command... Remarks
Enter system view system-view -
Enter IPv6 PIM view pim ipv6 -