QTECH QSW-8300 Инструкция по настройке - Manual (Page 236)

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Switch(config)#interface vlan 2
Switch(Config-If-Vlan2)# ip pim sparse-mode
Switch(Config-If-Vlan2)#exit
Switch(config)#interface vlan 3
Switch(Config-If-Vlan3)# ip pim sparse-mode
Switch(Config-If-Vlan3)#exit
Switch(config)#access-list 1 permit 224.1.1.1 0.0.0.255
Switch(config)#ip multicast ssm range 1
28.6.4 PIM-SSM Troubleshooting
In configuring and using PIM-SSM Protocol, PIM-SSM Protocol might not operate normally
caused by physical connection or incorrect configuration. Therefore, the user should pay
attention to the following issues:
Assure that physical connection is correct;
Assure the Protocol of Interface and Link is UP (use show interface command);
Assure that PIM Protocol is enabled in Global Mode (use ip pim multicast-routing);
Assure that PIM-SSM is configured on the interface (use ip pim sparse-mode);
Assure that SSM is configured in Global Mode;
Multicast Protocol requires RPF check using unicast routing, therefore the correctness of
unicast routing must be assured beforehand.
If all attempts including check are made but the problems on PIM-
SSM can’t be solved yet,
then use debug commands such debug pim event/debug pim packet please, and then copy
DEBUG information in 3 minutes and send to Technology Service Center.
28.7 DVMRP
28.7.1 Introduction to DVMRP
DVMRP Protocol, namely, is “Distance Vector Multicast Routing Protocol”. It is a Multicast
Routing Protocol in dense mode, which sets up a Forward Broadcast Tree for each source in a
manner similar to RIP, and sets up a Truncation Broadcast Tree, i.e. the Shortest Path Tree to
the source, for each source through dynamic Prune/Graft.
Some of the important features of DVMRP are:
The routing exchange used to determine reverse path checking information is based on
distance vector (in a manner similar to RIP)
Routing exchange update occurs periodically (the default is 60 seconds)
TTL upper limit = 32 hops (and that RIP is 16)
Routing update includes net mask and supports CIDR
In comparison with Unicast routing, Multicast routing is a kind of reverse routing (that is, what