topic Re: Same Vlan ID on Different Physical Interface in Network Security

Same Vlan ID on Different Physical Interface

Ravan Nagalingam — Mon, 02 Aug 2021 10:31:33 GMT

Currently i am required to enable 2 PPPoE ISP link on the ASA, this specific PPPoE link requires to be tag to vlan 500 for it to be working.

Since i am unable to created same VLAN ID on separate subinteface on the ASA.

Any way i can configure both ISP link on the ASA, with ASA doing the dial-up ?

Re: Same Vlan ID on Different Physical Interface

balaji.bandi — Mon, 02 Aug 2021 10:21:40 GMT

same VLAN ID for both the ISP ? only think of VRF (VRF Lite)

Re: Same Vlan ID on Different Physical Interface

Ravan Nagalingam — Mon, 02 Aug 2021 10:29:29 GMT

Yes same VLAN ID, cause its the same ISP.

Re: Same Vlan ID on Different Physical Interface

Ravan Nagalingam — Tue, 03 Aug 2021 03:29:12 GMT

Mine sharing some info regarding VFR-Lite on Cisco ASA how can i use it to achieve my requirement

Re: Same Vlan ID on Different Physical Interface

balaji.bandi — Tue, 03 Aug 2021 09:35:25 GMT

Look at the this thread may help you using same interface for both connection to same ISP .

https://community.cisco.com/t5/routing/pppoe-vrf/td-p/2923767

Re: Same Vlan ID on Different Physical Interface

Ravan Nagalingam — Wed, 04 Aug 2021 05:37:33 GMT

I believe the shared example are valid for Cisco router.

I don't see an option to configure those on the Cisco ASA, also i need to have both ISP on separate Physical Interface.

Re: Same Vlan ID on Different Physical Interface

balaji.bandi — Wed, 04 Aug 2021 09:30:45 GMT

Sure this required to be tested, as i have just provided the example to get an idea for yourself.

you can use below example for PPPoE :

https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/110322-asa-pppoe-00.html

One thinng i am not still sure, you can able to use VLAN same for both, or can be used Active/Active (so this required some test or wait for any one able to made success to give suggestion).