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Chapter 6
Configuring the Line Interface
Configuring DSCP Marking for IPinIP Tunnels
DSCP marking modifies the DSCP bits of the IPv4 header. In IPinIP tunnels there are at least two IP
headers. By default, DSCP marking is performed only on the external IP header (refer
Figure 6-1
Note
DSCP marking should be enabled and configured through SCA BB console. Refer to the section "How
to Manage DSCP ToS Marker Values" in the chapter "Using the Service Configuration Editor: Traffic
Control" in the Cisco Service Control Application for Broadband User Guide for further information.
Use this command to configure the SCE platform to mark the DSCP bits of the internal IP header. This
command takes effect only when IPinIP skip is enabled.
Step 1
Shut down the linecard. (This is a root level command.)
From the SCE(config if)#> prompt, type shutdown and press Enter.
Configure the DSCP marking (.
Step 2
From the SCE(config if)#> prompt, type ip-tunnel IPinIP DSCP-marking-skip and press Enter.
Enables DSCP marking on the internal IP header of IPinIP traffic.
Restart the linecard.
Step 3
From the SCE(config if)#> prompt, type no shutdown and press Enter.
OL-7827-12
DSCP Marking for IPinIP Tunnels
Cisco SCE 2000 and SCE 1000 Software Configuration Guide
Tunneling Protocols
Figure
6-1).
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