Chapter 30 Configuring the ASA CX Module

Monitoring the ASA CX Module

Command

Purpose

 

 

show asp drop

Shows dropped packets. The following drop types are used:

 

Frame Drops:

 

• cxsc-bad-tlv-received—This occurs when ASA receives a packet

 

from CXSC without a Policy ID TLV. This TLV must be present in

 

non-control packets if it does not have the Standy Active bit set in the

 

actions field.

 

• cxsc-request—The frame was requested to be dropped by CXSC due

 

a policy on CXSC whereby CXSC would set the actions to Deny

 

Source, Deny Destination, or Deny Pkt.

 

• cxsc-fail-close—The packet is dropped because the card is not up and

 

the policy configured was 'fail-close' (rather than 'fail-open' which

 

allows packets through even if the card was down).

 

• cxsc-fail—The CXSC configuration was removed for an existing

 

flow and we are not able to process it through CXSC it will be

 

dropped. This should be very unlikely.

 

• cxsc-malformed-packet—The packet from CXSC contains an invalid

 

header. For instance, the header length may not be correct.

 

Flow Drops:

 

• cxsc-request—The CXSC requested to terminate the flow. The

 

actions bit 0 is set.

 

• reset-by-cxsc—The CXSC requested to terminate and reset the flow.

 

The actions bit 1 is set.

 

• cxsc-fail-close—The flow was terminated because the card is down

 

and the configured policy was 'fail-close'.

 

 

show asp event dp-cp cxsc-msg

This output shows how many ASA CX module messages are on the dp-cp

 

queue. Currently, only VPN queries from the ASA CX module are sent to

 

dp-cp.

 

 

show conn

This command already shows if a connection is being forwarded to a

 

module by displaying the ‘X - inspected by service module’ flag.

 

Connections being forwarded to the ASA CX module will also display the

 

‘X’ flag.

 

 

Examples

The following is sample output from the show asp table classify domain cxsc command:

ciscoasa# show asp table classify domain cxsc Input Table

in id=0x7ffedb4acf40, priority=50, domain=cxsc, deny=false

hits=15485658, user_data=0x7ffedb4ac840, cs_id=0x0, use_real_addr, flags=0x0, protocol=0

src ip/id=0.0.0.0, mask=0.0.0.0, port=0

dst ip/id=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0 input_ifc=outside, output_ifc=any

in id=0x7ffedb4ad4a0, priority=50, domain=cxsc, deny=false

hits=992053, user_data=0x7ffedb4ac840, cs_id=0x0, use_real_addr, flags=0x0, protocol=0 src ip/id=0.0.0.0, mask=0.0.0.0, port=0

dst ip/id=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0 input_ifc=inside, output_ifc=any

Cisco ASA Series Firewall ASDM Configuration Guide

30-29

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Cisco Systems ASA 5545-X, ASA 5505, ASA 5555-X, ASA 5585-X 30-29, Ciscoasa# show asp table classify domain cxsc Input Table
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ASA Services Module, ASA 5555-X, ASA 5545-X, ASA 5585-X, ASA 5580 specifications

Cisco Systems has long been a leader in the field of network security, and its Adaptive Security Appliance (ASA) series is a testament to this expertise. Within the ASA lineup, models such as the ASA 5505, ASA 5580, ASA 5585-X, ASA 5545-X, and ASA 5555-X stand out for their unique features, capabilities, and technological advancements.

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