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Title: Virtual AC (VAC) mac-address flapping [Print this page]

Author: M.S.Bezzubov@mg Time: 2024-6-4 17:52
Title: 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?

Author: guominxiang@rui Time: 2024-6-4 18:15
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?

Author: M.S.Bezzubov@mg Time: 2024-6-4 19:03
Edited by Max Bezzubov at 2024-6-4 23:31

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?

Author: M.S.Bezzubov@mg Time: 2024-6-13 19:39

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...

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