H3C Technologies H3C S12500 Series Switches - Manual (Page 14)

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• Restricting the rate of the traffic on the ACFP server.
• Carrying the context ID in a packet to enable the ACFP server and ACFP client to communicate the
packet context with each other. The detailed procedure is as follows:
The ACFP server maintains a context table that can be queried with context ID. Each context ID
corresponds with an ACFP collaboration policy that contains information including inbound interface
and outbound interface of the packet, and collaboration rules. When the packet received by the ACFP
server is redirected or mirrored to the ACFP client after matching a collaboration rule, the packet carries
the context ID of the collaboration policy to which the collaboration rule belongs. When the redirected
packet is returned from the ACFP client, the packet also carries the context ID. With the context ID, the
ACFP server knows that the packet is returned after being redirected and then forwards the packet
correctly.
For the ACFP client to optimally control traffic, the two-level structure of collaboration policy and
collaboration rules is set in the collaboration to manage the traffic matching the collaboration rule based
on the collaboration policy. This enables flexible traffic management.
To better support the Client/Server collaboration mode and granularly and flexibly set different rules, the
collaboration content is divided into the following parts: ACFP server information, ACFP client
information, ACFP collaboration policy and ACFP collaboration rules. This information is saved in the
ACFP server.
An ACFP server supports multiple ACFP clients. Therefore, ACFP client information, ACFP collaboration
policy, and ACFP collaboration rules are organized in the form of tables.
ACFP server information is generated by the ACFP server itself. ACFP client information, ACFP
collaboration policy, and ACFP collaboration rules are generated on the ACFP client and sent to the
ACFP server through the collaboration MIB or collaboration protocol.
ACFP information
ACFP information include ACFP server information, ACFP client information, ACFP collaboration policy
information, and ACFP collaboration rules.
ACFP server information
ACFP server information contains the following parts:
• Supported working modes, including host, pass-through, mirroring, and redirect. An ACFP server
can support multiple working modes among these four at the same time. The ACFP server and
clients can collaborate with each other only when the ACFP server supports the working mode of
the ACFP client.
• Maximum expiration time of the supported collaboration policy, which indicates for how long the
collaboration policy of the ACFP server will remain valid.
• Whether the ACFP server can permanently save the collaboration policy. It mainly refers to whether
the ACFP server can keep the original collaboration policy after reboot.
• Currently supported context ID type, the location of the context ID in the packet is HGPlus-context
(carrying the preamble HGPlus as the context ID).
This information indicates the collaboration capabilities of an ACFP server. ACFP clients can access this
information through a collaboration protocol or collaboration MIB.
ACFP client information
ACFP client information contains the following parts: