This feature enables DSCP values to be included in all IKEv2 packets sent to the peer on the SWu interface. These IKEv2 packets are sent from the gateway to the UE (peer) in the IKEv2 SA_INIT Response message, and subsequently in all IKEV2 AUTH_RESP messages. The DSCP value is either marked in the TOS octet of the IPv4 header or the Traffic Class octet of the IPv6 header as defined in RFC 2474. The DSCP-marked IKEv2 packets are given higher priority on the network, and enables sessions to be established faster while minimizing packet drops.
The DSCP value can be configured using the ikev2-ikesa dscp command under the Crypto Template Configuration Mode. A default DSCP value of zero (0x00) is set when no configuration exists. For more information on configuring the DSCP value, refer Configuring IKEv2 DSCP Marking of this chapter.
This feature complies with the following standard(s):
RFC 2474 - Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers