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IPSEC running over ISDN PRI PPP Multilink

DEar All

I have a 3640 with a PRI module that I use for backing up my Frame relay network. I have also the need in case of DR to connect the PRI 30 Channel to a DR site and run IPSEC over the top. I have problem running IPSEC once my PPP Multilink add new channel the IPSEC connectivity grounds to a halt.

At my DR site I have a 2620, I have a VPN module at both ends.

Does someone have a sample config that they have tested.

Regards

Yves

1 REPLY

Re: IPSEC running over ISDN PRI PPP Multilink

IPsec is sensitive to out of order packets. This is the most likely explanation for your issue. Please check the following techdoc for a workaround:

http://googleweb-1.cisco.com/search?q=cache:http://cco-rtp-1.cisco.com/en/US/partner/tech/tk175/tk15/technologies_configuration_example09186a0080093e52.shtml+ppp+multilink+ipsec&ie=UTF-8&site=CDC&output=xml_no_dtd&client=CDC&proxystylesheet=CDC&oe=UT...

I believe the solution might be in the configuration of :

-no ppp multilink fragmentation- as described.

Let me know if this helps.

Regards,

Leo

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