Cisco Cisco IOS Software Release 12.2(11)YX
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Release Notes for the Cisco 7200 Series for
Cisco IOS Release 12.2(11)YX1
Cisco IOS Release 12.2(11)YX1
June 23, 2003
Text Part Number OL-3617-02
These release notes describe changes to the software for the Cisco 7200 series routers for Cisco IOS
Release 12.2(11)YX1.
Release 12.2(11)YX1.
Contents
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Introduction
Cisco IOS Software Release 12.1(11)YX1 features IPSec stateful failover, but with the addition of
generic routing encapsulation (GRE), a tunnel interface not tied to specific “passenger” or “transport”
protocols.
generic routing encapsulation (GRE), a tunnel interface not tied to specific “passenger” or “transport”
protocols.
Tunneling protocols, such as GRE, encapsulate packets inside of a transport protocol. A tunnel interface
creates a virtual point-to-point link between two routers at remote points over an IP internetwork. Each
tunnel must be configured separately for each link.
creates a virtual point-to-point link between two routers at remote points over an IP internetwork. Each
tunnel must be configured separately for each link.