Vxlan Datapath Debugging; Vemlog Debugging - Cisco Nexus 1000V Troubleshooting Manual

Chapter 23 VXLANs
S e n d d o c u m e n t c o m m e n t s t o n e x u s 1 k - d o c f e e d b a c k @ c i s c o . c o m .
This command does not show any output for the segment multicast groups. To save multicast table space,
Note
segment groups are not tracked by IGMP snooping on the VEM.
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Use the vemcmd show vxlan interfaces command to verify that IGMP queries are being received.
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Use the vempkt capture ingress ltl first_vxlan_vmknic_ltl command to see if the VMware stack is
sending joins.
Use the vempkt capture egress ltl uplink_ltl command to see if the joins are being sent out to the
upstream switch.

VXLAN Datapath Debugging

Use the commands listed in this section to troubleshot VXLAN problems.
This section contains the following topics:
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Vemlog Debugging

To debug the bridge domain setup or configuration, use the following command:
vemlog debug sfbd all
To debug port configuration/CBL/vEthernet LTL pinning, use the following command:
vemlog debug sfporttable all
(for encap/decap setup and decisions)
vemlog debug sfvnsegment all
To debug for actual packet editing, VXLAN interface handling, and multicast handling, use the
following command:
vemlog debug sflisp all
To debug multicast joins or leaves on the DPA socket, use the following command:
echo "debug dpa_allplatform all" > /tmp/dpafifo
To debug the bridge domain configuration, use the following command:
echo "debug sfl2agent all" > /tmp/dpafifo
To debug port configuration, use the following command:
echo "debug sfportagent all" > /tmp/dpafifo
OL-28795-01
IGMP queries:
IGMP joins from vmknic:
Vemlog Debugging, page 23-11
Vempkt, page 23-12
Statistics, page 23-12
Show Commands, page 23-13
Cisco Nexus 1000V Troubleshooting Guide, Release 4.2(1)SV2(2.1)
VXLAN Datapath Debugging
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