Cisco Cisco IOS Software Release 12.0(17)S
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Cisco IOS Release 12.0(17)S, 12.0(17)ST, 12.2(8)T, and 12.2(14)S
Tunnel ToS
Feature History
This document describes the Tunnel Type of Service (ToS) feature and includes the following sections:
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Feature Overview
The Tunnel ToS feature allows you to configure the ToS and Time-to-Live (TTL) byte values in the
encapsulating IP header of tunnel packets for an IP tunnel interface on a router. The Tunnel ToS feature
is supported on Cisco Express Forwarding (CEF), fast switching, and process switching forwarding
modes.
encapsulating IP header of tunnel packets for an IP tunnel interface on a router. The Tunnel ToS feature
is supported on Cisco Express Forwarding (CEF), fast switching, and process switching forwarding
modes.
Tunneling and Tunnel Interfaces
Tunneling provides a way to encapsulate arbitrary packets inside a transport protocol. This feature is
implemented as a virtual interface to provide a simple interface for configuration. The tunnel interface
is an architecture that is designed to provide the services necessary to implement any standard
point-to-point encapsulation scheme. It is not tied to specific “passenger” or “transport” protocols.
Because tunnels are point-to-point links, you must configure a separate tunnel for each link.
implemented as a virtual interface to provide a simple interface for configuration. The tunnel interface
is an architecture that is designed to provide the services necessary to implement any standard
point-to-point encapsulation scheme. It is not tied to specific “passenger” or “transport” protocols.
Because tunnels are point-to-point links, you must configure a separate tunnel for each link.
Release
Modification
12.0(17)S
This feature was introduced.
12.0(17)ST
This feature was integrated into Cisco IOS Release 12.0(17)ST.
12.2(8)T
This feature was integrated into Cisco IOS Release 12.2(8)T.
12.2(14)S
This feature was integrated into Cisco IOS Release 12.2(14)S.