H3C Technologies H3C S12500-X Series Switches - Manual (Page 154)

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Step Command Remarks
2. Bind a source interface to an
IPsec policy.
ipsec { ipv6-policy | policy }
policy-name local-address
interface-type interface-number
By default, no source interface is
bound to an IPsec policy.
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Enabling QoS pre-classify
If you apply both an IPsec policy and a QoS policy to an interface, QoS classifies packets by using the
new headers added by IPsec. If you want QoS to classify packets by using the headers of the original IP
packets, enable the QoS pre-classify feature.
For more information about QoS policy and classification, see ACL and QoS Configuration Guide.
To enable the QoS pre-classify feature:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter IPsec policy view.
ipsec { policy | ipv6-policy }
policy-name seq-number [ isakmp
| manual ]
N/A
3. Enable QoS pre-classify. qos pre-classify
By default, QoS pre-classify is
disabled.
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Enabling logging of IPsec packets
Perform this task to enable the logging of IPsec packets that are discarded because of reasons such as
IPsec SA lookup failure, AH-ESP authentication failure, and ESP encryption failure. The log information
includes the source and destination IP addresses, the SPI value, and the sequence number of a discarded
IPsec packet, and the reason for the failure.
To enable the logging of IPsec packets:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable the logging of IPsec
packets.
ipsec logging packet enable
By default, the logging of IPsec
packets is disabled.
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Configuring the DF bit of IPsec packets
Perform this task to configure the Don't Fragment (DF) bit in the new IP header of IPsec packets in one of
the following ways:
• clear—Clears the DF bit in the new header.
• set—Sets the DF bit in the new header.
• copy—Copies the DF bit in the original IP header to the new IP header.