What is an IKE Phase 2 function?

What is an IKE Phase 2 function?

The purpose of IKE phase 2 is to negotiate IPSec SAs to set up the IPSec tunnel. IKE phase 2 performs the following functions: Negotiates IPSec SA parameters protected by an existing IKE SA. Establishes IPSec security associations. Periodically renegotiates IPSec SAs to ensure security.

What is ISAKMP in networking?

The Internet Security Association and Key Management Protocol (ISAKMP) defines the procedures for authenticating a communicating peer, creation and management of Security Associations, key generation techniques, and threat mitigation (e.g. denial of service and replay attacks).

What is IPsec Phase 2 lifetime?

Cisco Meraki products, by default, use a lifetime of 8 hours (28800 seconds) for both IKE phase 1 and IKE phase 2. When there is a mismatch, the most common result is that the VPN stops functioning when one site’s lifetime expires.

What is ISAKMP?

What is ISAKMP policy?

The crypto isakmp policy command creates a unique ISAKMP/IKE management connection policy on the router, where each policy requires a separate number. Numbers can range between 110,000. Executing this command takes you to a subcommand mode where you enter the configuration for the policy.

What is ISAKMP IPsec?

RFC 2828 states ISAKMP is the protocol used in IPSec to handle SAs, key management and system authentication. Other sources say IKE is the protocol that used.

What happens when IPsec lifetime expires?

IPsec VPNs using IKE utilize lifetimes to control when a tunnel will need to re-establish. When these lifetimes are misconfigured, an IPsec tunnel will still establish but will show connection loss when these timers expire. This secondary lifetime will expire the tunnel when the specified amount of data is transferred.

What happens when the ISAKMP SA expires?

It doesnt make sense if ISAKMP SA expires then the IPSEC SA also needs to be timeout because ISAKMP (Phase 1) is performed to make IPSEC SA (Phase 2) to function 3. When IPSEC SA lifetime expires and if the traffic initiated then the ISAKMP SA established and Followed by IPSEC SA

What is Ike in ISAKMP?

ISAKMP Overview. IKE, also called ISAKMP, is the negotiation protocol that lets two hosts agree on how to build an IPsec security association. ISAKMP separates negotiation into two phases: Phase 1 and Phase 2. Phase 1 creates the first tunnel, which protects la ter ISAKMP negotiation messages.

What is the ISAKMP protocol?

IKE, also called ISAKMP, is the negotiation protocol that lets two hosts agree on how to build an IPsec security association. ISAKMP separates negotiation into two phases: Phase 1 and Phase 2. Phase 1 creates the first tunnel, which protects la ter ISAKMP negotiation messages.

What are the default ISAKMP and IPsec SA lifetimes?

With regard to choosing appropriate lifetimes for the ISAKMP and IPSec SAs, I believe the Cisco defaults are 86400 seconds (1 day), and 3600 seconds (1 hour) respectively. The IPSec SA lifetime may also be specified in kilobytes.