H3C Technologies H3C S6300 Series Switches - Manual (Page 239)

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Configuring an IPsec transform set
An IPsec transform set, part of an IPsec policy, defines the security parameters for IPsec SA negotiation,
including the security protocol, encryption algorithms, and authentication algorithms.
Changes to an IPsec transform set affect only SAs negotiated after the changes. To apply the changes to
existing SAs, execute the reset ipsec sa command to clear the SAs so that they can be set up by using the
updated parameters.
To configure an IPsec transform set:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create an IPsec
transform set and enter
its view. ipsec transform-set transform-set-name
By default, no IPsec transform set
exists.
3. Specify the security
protocol for the IPsec
transform set. protocol { ah | ah-esp | esp }
Optional.
By default, the IPsec transform set
uses ESP as the security protocol.
4. Specify the security
algorithms.
• (In non-FIPS mode.) Specify the
encryption algorithm for ESP:
esp encryption-algorithm { 3des-cbc
| aes-cbc-128 | aes-cbc-192 |
aes-cbc-256 | des-cbc | null } *
• (In FIPS mode.) Specify the
encryption algorithm for ESP:
esp encryption-algorithm
{ aes-cbc-128 | aes-cbc-192 |
aes-cbc-256 } *
• (In non-FIPS mode.) Specify the
authentication algorithm for ESP:
esp authentication-algorithm { md5
| sha1 } *
• (In FIPS mode.) Specify the
authentication algorithm for ESP:
esp authentication-algorithm sha1
• (In non-FIPS mode.) Specify the
authentication algorithm for AH:
ah authentication-algorithm { md5 |
sha1 } *
• (In FIPS mode.) Specify the
authentication algorithm for AH:
ah authentication-algorithm sha1
Configure at least one command.
By default, no security algorithm is
specified.
You can specify security algorithms
for a security protocol only when
the security protocol is used by the
transform set. For example, you
can specify the ESP-specific
security algorithms only when you
select ESP or AH-ESP as the security
protocol.
If you use ESP in FIPS mode, you
must specify both the ESP
encryption algorithm and the ESP
authentication algorithm.
You can specify multiple
algorithms by using one command,
and the algorithm specified earlier
has a higher priority.