Which two conditions are prerequisites for stateful failover for IPsec?

Stateful failover for IPsec requires that your network contains two identical routers that are available to be either the primary or secondary device. Both routers should be the same type of device, have the same CPU and memory, and have either no encryption accelerator or identical encryption accelerators.

Does IPsec provide availability?

The IPsec VPN High Availability Enhancements feature: Reverse Route Injection (RRI) and Hot Standby Router Protocol (HSRP) with IPsec. When used together, these two features provide you with a simplified network design for VPNs and reduced configuration complexity on remote peers when defining gateway lists.

What is IPsec stateful failover?

IPsec stateful failover typically requires a set of identical equipment so that failover can occur, and requires some continuous exchange of data between the devices to track the state of the IPsec VPNs (SA information). This also implies that there are multiple active IPsec VPN tunnels.

Is IPsec stateful?

Cisco IOS offers an alternative approach using a feature known as stateful IPsec failover to terminate an IPsec tunnel on multiple devices at one or both ends for failover.

Is IPsec stateless?

Stateless IPsec VPN HA refers to a scenario in which the state of a given Phase 1 or Phase 2 SA is not replicated to another separate, redundant IPsec device.

Which IPsec protocol has two phases?

There are two phases to build an IPsec tunnel: IKE phase 1. IKE phase 2.

What are the six packets of IPsec?

IPsec (Internet Protocol Security)

• Authentication Header Protocol. Transport Mode. Tunnel Mode.
• ESP (Encapsulating Security Payload) Protocol. Transport Mode. Tunnel Mode.
• AH and ESP. Transport Mode. Tunnel Mode.

What are the two phases of an IPsec VPN?

VPN negotiations happen in two distinct phases: Phase 1 and Phase 2. The main purpose of Phase 1 is to set up a secure encrypted channel through which the two peers can negotiate Phase 2. When Phase 1 finishes successfully, the peers quickly move on to Phase 2 negotiations.

What are IPSec phases?

What is the difference between IPsec Phase 1 and Phase 2?

Phase 1 Security Associations are used to protect IKE messages that are exchanged between two IKE peers, or security endpoints. Phase 2 Security Associations are used to protect IP traffic, as specified by the security policy for a specific type of traffic, between two data endpoints.

What is the difference between Phase 1 and Phase 2 in IPsec?

What happens in IPSec Phase 1 and Phase 2?

What is phase1 and phase2?

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.

How to make IPsec aware of HSRP setup?

The crypto map applied on a specific router interface is linked with the HSRP group already configured on that interface to make IPSec aware of HSRP setup. This also allows IPSec to use the HSRP virtual IP address as the Internet Security Association and Key Management Protocol (ISAKMP) identity of the HSRP routers.

What is Cisco HSRP protocol?

Tunneling protocol developed by Cisco that can encapsulate a wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-point link to Cisco routers at remote points over an IP internetwork. HSRP—Hot Standby Routing Protocol.

Why does the Cisco 7204vxr-1 switch from HSRP preempt to active router?

After the service recovers on the Cisco 7204VXR-1 original HSRP primary router, the device resumes position as active router because it has a higher priority and because HSRP preempt is configured. The show and debug command output from different routers shows another switchover of HSRP and IPSec.

What is the HSRP support for VPNs feature?

The HSRP Support for VPNs feature ensures that the HSRP virtual IP address is added to the correct IP routing table and not to the default routing table.