AH and ESP used in both phase 1 and 2?

[ciscoforum]

AH and ESP is the protocol used in IKE phase 2 when establishing IPsec SA or also used in the IKE phase 1? If not, what IP packet format used in the IKE phase 1? Thanks

[grant.maynard]

Have a read at http://www.cisco.com/en/US/tech/tk583/tk372/technologies_tech_note09186a00801d55aa.shtml

[hemendoz]

Hello,

You asked

"AH and ESP is the protocol used in IKE phase 2 when establishing IPsec SA or also used in the IKE phase 1?" AH and ESP are only used after the Phase 2 SAs have been built.

"If not, what IP packet format used in the IKE phase 1?" UDP 500 or 4500 (if NAT-T is used)

Hope that helps! If so, please rate.

Thanks