Qtech QSW-3900-24-Т-DC [200/313] Pim configuration

Qtech QSW-3900-24-SFP-DC [200/313] Pim configuration
QTECH Software Configuration Manual
12-199
12.9.3 Working theory of PIM-SSM
According to protocol standard, SSM’s realization relys on PIM-SM. It can exist with PIM-SM in the same
router. Using SSM or PIM-SM is determined by multicast address in data and protocol packet. IANA distributes
address segment from 232.0.0.0 to 232.255.255.255, the multicast group of which will not add to share tree but
handle by SSM. SSM needs to realize neighbor detect and DR election.
It is realized by IGMPv3 for router host. IGMPv3 adds source filtration and permits host specifying to
receive data from specific group, and specifying to receive data of specific source in this group. When SSM receives
IS_IN packet of IGMPv3 to know there is host in the network which interface who received IGMP packet connected
to want to receive data packet sending to multicast group G from source S. Send PIM (S,G) source group adding
packet to the first-hop router connected multicast source according to unicast route towards the direction of source
hop-by-hop to establish the shortest path tree between multicast source and the last-hop router connected to
receiver.When multicast source sending multicast data, data will be received along the shortest path.
For the host supporting IGMPv1/IGMPv2 but not IGMPv3, configure ssm-mapping in connected router,add
packet mapping of group sent by IGMPv1/IGMPv2 to source group to use SSM in network.
12.10 PIM configuration
12.10.1 PIM configuration list
Configuring PIM needs following operation: when router runs in PIM-DM protocol domain, it is suggested
enabling PIM-DM in all interface of non-border router. PIM-SM need not enable PIM-SM in all interface.
Basic configuration of PIM:
1. Enable multicast protocol
2. Enable PIM-DM or PIM-SM protocol
Advanced configuration of PIM:
1. Configure Hello packet sending interval
2. Configure BSR bordor
3. Enter PIM mode
4. Configure multicast source (group) filtrate
5. Configure PIM neighbor filtrate
6. Configure max number of PIM neighbor
7. Configure static RP
8. Specify candidate BSR
9. Specify candidate RP
10. Configure SPT threshold
11. Configure SSM multicast range
12.10.2 Specified interface to run PIM-DM protocol
PIM-DM protocol needs enabling in each interface.
After configuring PIM-DM, it will send Hello packet timely and handle protocol sent by PIM neighbor.
Configure it in VLAN interface configuration mode:
Specified interface to run PIM-DM protocol
ip pim dense-mode
Disable PIM-DM protocol

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