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Cisco Catalyst 3650 2 ISP vlan to remote office and address-table learning disabled on vlans

dboevets
Level 1
Level 1

Good day!

I have 2 Catalyst 3650 in stack (role intervlan routing)

#show version

Cisco IOS Software, IOS-XE Software, Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 03.06.06E

 

And 2 ISPs provide service VLAN to remote office - VLAN ID the same 3524 and configured like mode access.

1-st ISP works, bun when I try to connect second ISP - doesn't work.

Before turn on port of 2 ISP I shut down port 1 ISP.

Configuration Catalyst 3650

 

Interface GigabitEthernet1/0/1 (before connect ISP-2 I shutdown this port)
description ISP-1
switchport access vlan 3524
switchport mode access
spanning-tree portfast

 

Interface GigabitEthernet1/0/2 (and no shutdown this)
description ISP-2

shutdown
switchport access vlan 3524
switchport mode access
spanning-tree portfast

 

#show ip interface brief

Vlan3524 192.168.3.1 YES manual up up

 

Remote switch

C3560 Software (C3560-IPBASEK9-M), Version 15.0(2)SE11

Выделение_227.jpg

show ip interface brief

Vlan3524 192.168.3.41 YES NVRAM up up

 

#show spanning-tree vlan 3524

Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi0/1 Desg FWD 4 128.1 P2p
Gi0/2 Desg FWD 4 128.2 P2p

 

Interesting fact when I change Catalyst 3650 to another (3560) switch ports between ISPs works.

Configuration this switch the same

interface GigabitEthernet0/1 (ISP1)
switchport access vlan 3524
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet0/2 (ISP2)
switchport access vlan 3524
switchport mode access

spanning-tree portfast

 

May be reason in that

On 3650 (in production)

#show mac address-table learning
Learning disabled on vlans: 

And I can't turn in on

(config)#mac address-table learning vlan 3524

doesn't help - learning steel disabled.

maybe its normal for 3650 in stackwise?

 

Perhaps there is an assumption of what is the reason.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 Replies 2

dboevets
Level 1
Level 1

And when I turn on int 1/0/2 (IPS2) I see mac of vlan interface on remote switch int vlan 3524, but can't ping in (192.168.3.41) and hosts connected to this switch.

There is issue with stp' 

ISP is not allow stp bpdu and hence the both port is FWD which must be one FWD and other BLK' 

If the ISP is same ask them if you can use PO or not?

MHM