Cisco Explorer 4700 Installation Guide download pdf (Page 301)

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance

OL-26645-01

Chapter 8 Configuring Parameter Maps

Configuring HTTP Parameter Maps

Header Modify Per-Request Check the check box to require SSL information be inserted for every HTTP GET request.

Current functionality only requires that the information be inserted at the first GET

request.

Exceed Max. Parse Length Indicate how the ACE appliance is to handle cookies, HTTP headers, and URLs that

exceed the maximum parse length:

• Continue—Indicates that the ACE appliance is to continue load balancing. When this

option is selected, the HTTP Persistence Rebalance option is disabled if the total

length of all cookies, HTTP headers, and URLs exceeds the maximum parse value.

• Drop—Indicates that the ACE appliance is to stop load balancing and to discard the

packet.

HTTP Persistence Rebalance Check this check box to enabled persistence rebalance. Persistence is sometimes referred

to as a connection keepalive.

With persistence rebalance enabled, when successive GET requests result in load

balancing that chooses the same policy, the ACE sends the request to the real server used

for the last GET request. This behavior prevents the ACE from load balancing every

request and recreating the server-side connection on every GET request, producing less

overhead and better performance.

Another effect of persistence rebalance is that header insertion and cookie insertion, if

enabled, occur for every request instead of only the first request.

By default, persistence rebalance is enabled. Clear this check box to indicate that this

option is disabled.

TCP Server Connection Reuse Check this check box to indicate that the ACE appliance is to reduce the number of open

connections on a server by allowing connections to persist and be reused by multiple

client connections. If you enable this feature:

• Ensure that the ACE appliance maximum segment size (MSS) is the same as the

server maximum segment size.

• Configure port address translation (PAT) on the interface that is connected to the real

server.

• Configure on the ACE appliance the same TCP options that exist on the TCP server.

• Ensure that each server farm is homogeneous (all real servers within a server farm

have identical configurations).

Clear this check box to disable this option.

Enable Drop on Parsing Error Check this check box to have the ACE drop a connection when it detects a parse error.

Clear the check box to disable this option and configure the ACE maintain a connection

even when it detects a parse error. This is the default setting.

Table 8-2 HTTP Parameter Map Attributes (continued)

Field Description

1 ... 300 301 302 ... 648

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