Cisco Explorer 4700 Installationsanleitung PDF herunterladen (Seite 183)

5-47

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

OL-26645-02

Chapter 5 Configuring Virtual Servers

Configuring Virtual Servers

Hash Secondary

The ACE selects the server by using the hash value based on the specified cookie name in the URL

query string, not the cookie header.

In the Cookie Name field, enter a cookie name in the form of an unquoted text string with no spaces

and a maximum of 64 characters.

Hash Header The ACE selects the server by using a hash value based on the header name.

In the Header Name field, select the HTTP header to be used for server selection:

• To specify an HTTP header that is not one of the standard HTTP headers, select the first radio

button and enter the HTTP header name in the Header Name field. Valid entries are unquoted text

strings with no spaces and a maximum of 64 characters.

• To specify one of the standard HTTP headers, select the second radio button, and then select one

of the HTTP headers from the list.

Hash Layer 4 The ACE selects the server by using a Layer 4 generic protocol load-balancing method. Use this

predictor to load balance packets from protocols that are not explicitly supported by the ACE.

1. In the Begin Pattern field, enter the beginning pattern of the Layer 4 payload and the pattern string

to match before hashing. If you do not specify a beginning pattern, the ACE starts parsing the

HTTP body immediate following the offset byte. You cannot configure different beginning and

ending patterns for different server farms that are part of the same traffic classification.

Valid entries are unquoted text strings with no spaces and a maximum of 255 alphanumeric

characters. The ACE supports regular expressions for matching string expressions. Table 12-33

lists the supported characters that you can use for matching string expressions.

2. In the End Pattern field, enter the pattern that marks the end of hashing. If you do not specify either

a length or an end pattern, the ACE continues to parse the data until it reaches the end of the field

or the end of the packet, or until it reaches the maximum body parse length. You cannot configure

different beginning and ending patterns for different server farms that are part of the same traffic

classification.

Valid entries are unquoted text strings with no spaces and a maximum of 255 alphanumeric

characters. The ACE supports regular expressions for matching string expressions. Table 12-33

lists the supported characters that you can use for matching string expressions.

3. In the Length field, enter the length in bytes of the portion of the payload (starting with the byte

after the offset value) that the ACE uses for sticking the client to the server. Valid entries are

integers from 1 to 1000 bytes.

The offset and length can vary from 0 to 1000 bytes. If the payload is longer than the offset but

shorter than the offset plus the length of the payload, the ACE sticks the connection based on that

portion of the payload starting with the byte after the offset value and ending with the byte

specified by the offset plus the length. The total of the offset and the length cannot exceed 1000.

You cannot specify both the length and end-pattern options for a Hash Layer 4 predictor.

4. In the HTTP Content Offset field, enter the portion of the content that the ACE uses to stick the

client on a particular server by indicating the bytes to ignore starting with the first byte of the

payload. Valid entries are integers from 0 to 999 bytes. The default is 0, which indicates that the

ACE does not exclude any portion of the content.

Table 5-12 Predictor Methods and Attributes (continued)

Predictor Method Description / Action

1 2 ... 178 179 180 181 182 183 184 185 186 187 188 ... 647 648

Kommentare zu diesen Handbüchern

Keine Kommentare

Cisco Explorer 4700 Installationsanleitung Seite 183

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Digitale Videorecorder (DVR) Cisco Explorer 4700