Nexus 5548 vlan 4040

[Dmitry Kishkin]

Hi, i found on my switch vlan 4040, mac address vlan 4040 cross with my active int-vlan interface. But i can't found in configuration where is vlan 4040 use. What is vlan 4040 ? 

[Mark Malone · Accepted solution]

there the reserved vlan range for nx-os

3968 to 4047 and 4094

Internally allocated

These 80 VLANs and VLAN 4094 are allocated for internal device use. You cannot create, delete, or modify any VLANs within the block reserved for internal use.

does it show up in your show vlan or show int trunk anywhere ?

system maybe using it for something

[Dmitry Kishkin]

Thank you for you answer.

I see this vlan only in command "sh mac adress table". Any else i can't found him. Mac address cross with active vlan:

# sh mac address-table address 002a.6xx.xxxx
Legend:
* - primary entry, G - Gateway MAC, (R) - Routed MAC, O - Overlay MAC
age - seconds since last seen,+ - primary entry using vPC Peer-Link
VLAN MAC Address Type age Secure NTFY Ports/SWID.SSID.LID
---------+-----------------+--------+---------+------+----+------------------
* 802 002a.xxxx.xxxx static 0 F F Router
* 4040 002a.xxxx.xxxx static 0 F F Router

[Mark Malone]

that's a cisco internal static system mac im pretty sure as its 002a check the mac here ---https://macvendors.com/

[Dmitry Kishkin]

yes. This mac owned interface vlan 802. 

[maxnpj]

I see that same VLAN (4040) but I see it in the "sh vpc consistency-parameters global" output under the "Allowed VLANs" section. It is on one side of the vPC but not the other and i think that is what is causing the Type 2 inconsistency status.

Type-2 consistency status              : failed
Type-2 inconsistency reason            : SVI type-2 configuration incompatible

I realize the "reason " states 'SVI config incompatible" but all of my SVI's are consistent across the two vdc's. Could this mystery VLAN be causing the Type 2 inconsistency?