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Protocol Overview Troubleshooting PIM-SM
page 16-4 OmniSwitch Troubleshooting Guide September 2005
PIM: ----- PIM Header -----
PIM:
PIM: Version = 2
PIM: Message Type = 0 (Hello)
PIM: Reserved = 0
PIM: Checksum = 4017 (correct)
PIM: Option Type = 1 (PIM-SM)
PIM: Option Length = 2
PIM: Option Value = 0x0069 (Hold time in seconds)
Debugging Hello Messages
To debug DR election and view Hello messages sent and received on PIM router interface, use the follow-
ing commands:
-> ip pimsm debug-type hello
-> ip pimsm debug-level 100
Debug output:
tPimsm-: Sending hello on 2 with IP 192.168.12.1
tPimsm-: Sending hello on 100 with IP 10.1.1.1
tPimsm-: Sending hello on 1 with IP 192.168.11.1
Sending hello on 2 is a Hello message sent on VLAN 2, and the interface with IP 192.168.12.1 is the
router interface sending the Hello message
tPimsm-: Received hello from 192.168.11.2 on 1, len=22
tPimsm-: Recvd. hello from 192.168.11.2 on vlan 1 Holdtime 105
tPimsm-: Recvd. hello from 192.168.11.2 on vlan 1 Priority 1
tPimsm-: Recvd. hello from 192.168.11.2 on vlan 1 Genid 56455
Received hello from 192.168.11.2 is the sender of the Hello message on 1. len=22 is respectively the
VLAN on which the packet is received, and the packet length Holdtime 105 is the holdtime in seconds.
Priority 1 all PIM-SM routers have the same value and are not configurable.
Genid 56455.