Virtual AC (VAC) mac-address flapping

Hi there

We are have two of AC 6108 running at VAC mode.




Although our ACs have physically connected to different switches over DC fabric.  As to me VAC should work as active-passive and per cli outputs it that so.

System description      : Ruijie Gigabit Wireless Switch(WS6108) By Ruijie Networks.
System start time       : 2024-05-27 17:39:43
System uptime           : 7:19:10:19
System hardware version : 1.40
System software version : AC_RGOS 11.9(6)W3B4, Release(10231516)
System patch number     : NA
System web version      : WLANWEB 11.9(6)W3B4, Release(10231516)

wac01#sh virtual-ac topology

Switch[1]: master, MAC: 4881.d4cf.4da7
Switch[2]: standby, MAC: 4881.d4cf.4da3

So what i see at AC periodically is mac-flapping over our DC fabric to unknown reason and our fabric blocks this behavior.



virtual-ac self-balance not enabled.


What have i missed? Any ideas is how to fix it?

Hello Max Bezzubov,

I‘m sorry that we can't provide a specific solution for you based on current information.
Can you help to check the following aspects:
1. Here is the configure gudie of VAC in case you need: https://community.ruijienetworks.com/forum.php?mod=viewthread&tid=2478&extra=page%3D1
2. May I know the topology please?
3. May I know the specific issue please? Does mac-flapping happen to end users or AC? Can you provide some screenshots for checking?
4. If possible, may you please share with us AC "show run" configuration please?

GTAC-Micca replied at 2024-6-4 18:15
Hello Max Bezzubov,

I‘m sorry that we can't provide a specific solution for you based on current i ...

Thanks for providing cookbook. I've exactly guided it for VAC config. Looks like mac-flapping happen to end users so AC is not accessible to AP or Admins.
Flapping is happens on vlan for mgmt over uplinks to each of VPC-pair switches and between AC itself.

sh int vlAN 700

Index(dec):4796 (hex):12bc

VLAN 700 is UP  , line protocol is UP

  Hardware is VLAN, address is 4881.d4cf.4da8 (bia 4881.d4cf.4da8)

  Description: WAC_MGMT

  Interface address is: xxxx

  ARP type: ARPA, ARP Timeout: 3600 seconds

  Interface IPv6 address is:

    No IPv6 address

  MTU 1500 bytes, BW 1000000 Kbit

  Encapsulation protocol is Ethernet-II, loopback not set

  Keepalive interval is 10 sec , set

  Carrier delay is 2 sec

  Rxload is 0/255, Txload is 0/255

VAC config is over here.

#sh virtual-ac config

device_id: 1 (mac: 4881.d4cf.4da7)

!

device virtual domain 100

!

device 1

device 1 priority 100

!

port-member interface GigabitEthernet 0/1 copper

device convert mode virtual

!

device_id: 2 (mac: 4881.d4cf.4da3)

!

device virtual domain 100

!

device 2

device 2 priority 90

!

port-member interface GigabitEthernet 0/1 copper

device convert mode virtual

!

Building configuration...

Current configuration: 151 bytes

interface AggregatePort 1

description =ACI Uplink

switchport mode trunk

switchport trunk allowed vlan only 700,770-771

ip dhcp snooping trust

interface VLAN 700

description WAC_MGMT

ip address x.x.x.x y.y.y.y

Regarding of the topology. We are have two of AC. Each of AC is connected to two uplink switch via fiber Port-Chanel (Agg) via VPC. Also AC have an interconnect each other over copper Gigabit ethernet.

vlan 700 is allowed over fabric (AggregatePort 1).

sh mac vlan 700

Vlan        MAC Address          Type     Interface

----------  -------------------- -------- ------------------------------

700        0000.0c9f.f2bc       DYNAMIC  AggregatePort 1

700        34ed.1b0d.3b54       DYNAMIC  AggregatePort 1

700        34ed.1b0d.c32c       DYNAMIC  AggregatePort 1

700        4c71.0dfb.e5ff       DYNAMIC  AggregatePort 1

700        7c21.0e3a.315f       DYNAMIC  AggregatePort 1

700        7c21.0eb4.e4df       DYNAMIC  AggregatePort 1

700        7c21.0eb4.f61f       DYNAMIC  AggregatePort 1

For some reason I've got the same MAC from each of AC. I've expected one only from the master (active).

wac01#sh virtual-ac topology

Switch[1]: master, MAC: 4881.d4cf.4da7

Switch[2]: standby, MAC: 4881.d4cf.4da3

Any ideas?

GTAC-Micca replied at 2024-6-4 18:15
Hello Max Bezzubov,

I‘m sorry that we can't provide a specific solution for you based on current i ...

GTAC-Micca Did you forget about issue of mine? Any news will be helpful...