topic RE: FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link in ExtremeSwitching (VSP/Fabric Engine)

FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link

EF — Mon, 22 Nov 2021 11:20:00 GMT

Hi team,

In a L2 connection through ISP with MTU less of 1600bytes, I´m using FIGWs for fabric extend (VXLAN) and fragmentation & reassembly to establish isis adjacencies without problem.

Now I want to add IPSEC but I review all the topologies avalaible for IPSEC and all of them are trought L3, the question is, in a link L2 is IPSEC topology supported?

Regards

EF

RE: FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link

Miguel-Angel_RO — Thu, 25 Nov 2021 11:49:00 GMT

EF,
You should describe deeper your setup.
The IPSec tunnel+frag/defrag can be performed at the FIGW level while the isis logical interface is done at the switch level.
You should describe what you have today in a picture to be able to guide you.

Mig

RE: FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link

EF — Thu, 25 Nov 2021 16:47:00 GMT

I´ll try better, this is my working environment (VXLAN+FRAGMENTATION) , My deploy is L2 link with MTU less 1600 bytes between two FIGWs and it´s working fine:

Now I want to add IPSEC but I'm unable to add the necessary commands because there are exclusion with this config.

After my investigation I see that all topologies with IPSEC are over L3 networks,

so I begin to suspect that it´s not supported over L2 links.

It´s a question about topologies supported with FIGW and IPSEC.

RE: FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link

Miguel-Angel_RO — Fri, 26 Nov 2021 13:23:00 GMT

EF,

IPSEC is always over L3. MACSEC is over L2.
Here a possible setup
Mig

RE: FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link

Ludovico_Steven — Mon, 29 Nov 2021 17:48:00 GMT

Running IPsec tunnels over a L2 WAN (e.g. VPLS) should be possible, but i have never tried it. You would not set any wan-intf-gw-ip on the FIGW.
The FIGW would thus ARP for the remote end-points.

RE: FIGW - IPSEC + VXLAN + FRAGMENTATION AND REASSEMBLY over L2 link

EF — Mon, 29 Nov 2021 17:57:00 GMT

Hi Ludovico,

this is the problem, if I´m not wrong, that "set global wan-intf-gw-ip " is mandatory for IPSEC config, but in a l2 connection I dont have it.

Regards

EF