Cisco Cisco Dynamic Fabric Automation for OpenStack Troubleshooting Guide
Cisco Dynamic Fabric Automation Production Troubleshooting Guide
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3.6 VDP profile de-instantiation
The HMM process keeps track of VDP hosts on a per-segment basis. When all hosts have left a given segment, the
leaf switch will un-apply the profile and free up the dynamically allocated resources.
leaf switch will un-apply the profile and free up the dynamically allocated resources.
VDP host deletion
When a VM is disconnected from the network, the VDP Station (Nexus 1000V) will signal the event by sending a VDP
De-associate TLV to the VDP bridge (leaf switch). This will trigger the deletion of the VSI.
De-associate TLV to the VDP bridge (leaf switch). This will trigger the deletion of the VSI.
To account for situations where the Nexus 1000V switch cannot send de-association requests, such as in the case of
unexpected resets, power outages or disconnection from the network, the leaf switch also maintains a countdown
keepalive timer for each associated VSI. During the life of the VM association, the Nexus 1000V refreshes the state and
the countdown keepalive timer on the leaf switch by periodically sending VDP Associate TLVs. These TLVs serve as
keepalive messages, and are sent approximately every 10 seconds by default. Below you can verify the evb timers and
VSI entries for a specific VNI.
unexpected resets, power outages or disconnection from the network, the leaf switch also maintains a countdown
keepalive timer for each associated VSI. During the life of the VM association, the Nexus 1000V refreshes the state and
the countdown keepalive timer on the leaf switch by periodically sending VDP Associate TLVs. These TLVs serve as
keepalive messages, and are sent approximately every 10 seconds by default. Below you can verify the evb timers and
VSI entries for a specific VNI.
acorn3# show evb
EVB (Edge Virtual Bridge)
Role : VDP bridge
VDP MAC address : 0180.c200.0000 (Nearest Bridge)
0180.c200.0000 (User)
Resource wait init : 25 (~ 335 sec)
Keep-alive init : 27 (~ 1342 sec)
No. received vdpdu : 1638
No. dropped vdpdu : 0
No. received tlv : 6867
No. received mgr tlv : 1638
No. received assoc tlv : 5229
No. received cmd : 10
acorn3# show evb vsi detail vni 31015
VSI entry table
No. of VSI entries: 1
No. of associated: 1
E-state: P - Pre-associated
PR - Pre-associated with reservation
A - Associated
D - De-associated
S - Standby
Mgr ID VSI ID Interface Profile ID M-state E-State RWD/RKA
-------- ---------------- --------------- ------------- -------- ------- -------
00000000 7927005056B972C6 Eth1/26 00007927 WAIT_CMD A 1339
MGR: 00000000000000000000000000000000
VSI ID: 00000000000000007927005056B972C6
Host name: TestVM1
Interface: Ethernet1/26
S-Channel: 1