Cisco Nexus 1000V - VEM Packet Path Debugging

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Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
OL-31593-01
Chapter 25 VXLANs
VEM Packet Path Debugging
Bridge domain 26 brtmax 4096, brtcnt 3, timeout 300
Segment ID 9001, swbd 4102, "segment-cisco"
Flags: P - PVLAN S - Secure D - Drop
Type MAC Address LTL timeout Flags PVLAN Remote IP DSN
SwInsta 00:50:56:83:01:4e 561 0 10.106.199.117 1
Static 00:50:56:83:01:61 54 0 0.0.0.0 1
Static 00:50:56:83:01:60 53 0 0.0.0.0 1
switch#
Displays the port configuration on the VEM:
switch# vemcmd show port
LTL VSM Port Admin Link State PC-LTL SGID Vem Port Type
17 Eth4/1 UP UP F/B* 561 0 vmnic0
49 DOWN UP BLK 0 RedHat_VM1_112 ethernet7
50 Veth8 DOWN UP BLK 0 RedHat_VM1_112.eth8
51 Veth4 UP UP FWD 0 0 vmk1 VXLAN
52 DOWN UP BLK 0 RedHat_VM1_112.eth6
53 Veth2 UP UP FWD 0 RedHat_VM1_112.eth4
54 Veth3 UP UP FWD 0 RedHat_VM1_112.eth5
561 Po2 UP UP F/B* 0
Displays the VTEP distribution on the VEM:
switch# vemcmd show vxlan-VTEPs
Bridge-Domain: segment-cisco Segment ID: 9001
Designated Remote VTEP IPs (*=forwarding publish incapable):
10.106.199.117(DSN: 1),
Note: You can compare the download sequence number against the VTEP download sequence
number using the vemcmnd show bd bd-name.
Displays if the MAC address table displays the remote IP learning in the segment-cisco bridge domain:
switch# vemcmd show l2 bd-name segment-cisco
Note - Use the module command to check the details of VEM and gateway on the VSM.
Bridge domain 26 brtmax 4096, brtcnt 3, timeout 300
Segment ID 9001, swbd 4102, "segment-cisco"
Flags: P - PVLAN S - Secure D - Drop
Type MAC Address LTL timeout Flags PVLAN Remote IP DSN
Dynamic 00:50:56:83:01:4e 561 1 10.106.199.117 0
Static 00:50:56:83:01:61 54 0 0.0.0.0 0
Static 00:50:56:83:01:60 53 0 0.0.0.0 0
To display the VLAN-VXLAN mappings programmed on the VEM:
switch# vemcmd show vlan-vxlan mapping
Note - Use the module command to check the details of VEM and gateway on the VSM.
To display the multi-MAC capable interfaces on the VEM:
Note - Use the module command to check the details of VEM and gateway on the VSM.
switch# vemcmd show multi-mac-capable interfaces
VEM Packet Path Debugging
Use the following commands to debug VXLAN traffic from a VM on VEM1 to a VM on VEM2.
• VEM1: Verify that packets are coming into the switch from the segment vEthernet.
vempkt capture ingress ltl vxlan_veth