Manual

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switch. DVMRP switch makes use of poison reverse to notify the upstream switch for some
specific source: “I am your downstream.” By adding infinity (32) to the routing distance of some
specific source it broadcasts, DVMRP switch responds to the source upstream exchange to
fulfill poison reverse. This means distance correct value is 1 to 2* infinity (32) -1 or 1 to 63, 1 to
63 means it can get to source network, 32 means source network is not arrival, 33 to 63
means the switch which generates the report message will receive multicast packets from
specific source depending on upstream router.
28.7.2 DVMRP Configuration Task List
Globally enable and disable DVMRP (Required)
Configure Enable and Disable DVMRP Protocol at the interface (Required)
Configure DVMRP Sub-parameters (Optional)
Configure DVMRP interface parameters
Configure the delay of transmitting report message on DVMRP interface and the message
number each time it transmits
Configure metric value of DVMRP interface
Configure if DVMRP is able to set up neighbors with DVMRP routers which can not
Prune/Graft
Configure DVMRP tunnel
1. Globally enable DVMRP Protocol
The basic configuration to function DVMRP routing protocol on QTECH series Layer 3 switch
is very simple. Firstly it is required to turn on DVMRP switch globally.
Command
Explanation
Global Mode
[no] ip dvmrp multicast-routing
Globally enable DVMRP Protocol, the “no ip
dvmrp multicast-routing” command disables
DVMRP Protocol globally. (Required)
2. Enable DVMRP Protocol on the interface
The basic configuration to function DVMRP routing protocol on QTECH series Layer 3 switch
is very simple. After globally enabling DVMRP Protocol, it is required to turn on DVMRP switch
under corresponding interface.
Command
Explanation
Interface Configuration Mode
ip dvmrp
no ip dvmrp
Enable DVMRP Protocol on the interface, the “no
ip dvmrp” command disables DVMRP Protocol on
the interface.
3. Configure DVMRP Sub-parameters