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

OL-26645-02

Chapter 4 Configuring Virtual Contexts

Creating Virtual Contexts

Step 4 Do one of the following

• Click Deploy Now to deploy this virtual context. To configure other virtual context attributes, see

the “Configuring Virtual Contexts” section on page 4-7.

• Click Cancel to exit this procedure without saving your entries and to return to the All Virtual

Contexts table.

Related Topics

• Using Virtual Contexts, page 4-2

• Configuring Virtual Contexts, page 4-7

SNMP v2c Read-Only

Community String

When you check the Enable SNMP Get check box, this field appears.

Enter the SNMPv2c read-only community string to be used as the SNMP Get community

string.

This field is read-only if configured for existing contexts.

Note If SNMP is not an allowed protocol, the ACE Appliance Device Manager will not be

able to poll the context.

Add Admin User When initially configuring the context, check this check box to configure this context for an

Admin user. When the fields appear, enter the user name and password, and confirm the

password.

More Settings

Switch Mode Check this check box to change the way that the ACE processes TCP connections that are not

destined to a VIP or that do not have any policies associated with their traffic. For such traffic,

the ACE still creates connection objects but processes the connections as stateless

connections, which means that they do not undergo any TCP normalization checks. With this

option enabled, the ACE also creates stateless connections for non-SYN TCP packets if they

satisfy all other configured requirements. This process ensures that a long-lived persistent

connection passes through the ACE successfully (even if it times out) by being reestablished

by any incoming packet related to the connection.

By default, these stateless connections time out after 2 hours and 15 minutes unless you

configure the inactivity timeout otherwise in a parameter map. When a stateless connection

times out, the ACE does not send a TCP RST packet but silently closes the connection. Even

though these connections are stateless, the TCP RST and FIN-ACK flags are honored and the

connections are closed when the ACE sees these flags in the received packets.

Shared VLAN Host Id Specific bank of MAC addresses that the ACE uses. Enter a number from 1 to 16. Be sure to

configure different bank numbers for multiple ACEs. This field is available only in the Admin

context.

Regex Compilation Timeout

(minutes)

Enter the timeout for regex compilation in minutes. When you configure a regex and its

compilation is longer than the configured timeout, the ACE stops the regex compilation. A

valid entry is an integer from 1 to 500. The default timeout is 60. This field is available only

in the Admin context.

Table 4-1 Virtual Context Configuration Attributes (continued)

Field Description

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 647 648

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