Cisco Nexus 1000V User Manual

25-18
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
OL-31593-01
Chapter 25 VXLANs
VXLAN Data Path Debugging
• IGMP state on the VEM:
vemcmd show igmp vxlan_transport_vlan detail
Note This command does not show any output for the segment multicast groups. To save multicast table space,
segment groups are not tracked by IGMP snooping on the VEM.
• IGMP queries:
Use the vemcmd show vxlan interfaces command to verify that IGMP queries are being received.
• IGMP joins from VTEP:
Use the vempkt capture ingress ltl first_vxlan_VTEP_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 Data Path Debugging
Use the commands listed in this section to troubleshot VXLAN problems.
This section contains the following topics:
• vemlog Debugging, page 25-18
• Vempkt, page 25-19
• Statistics, page 25-20
• show Commands, page 25-20
vemlog Debugging
To debug the bridge domain setup or configuration, use the following command:
vemlog debug sfbd all
To debug the port configuration/CBL/vEthernet LTL pinning, use the following command:
vemlog debug sfporttable all
(for encapsulated/decapsulated 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 the port configuration, use the following command:

Cisco Nexus 1000V Specifications

General

Type	Virtual Switch
Manageable	Yes
NetFlow	Yes
SPAN	Yes
ERSPAN	Yes
Operating System	Cisco NX-OS
Form Factor	Virtual
Hypervisor Support	VMware ESXi
Features	VXLAN
Security Features	Port Security, Private VLANs, ACLs