VPN Acceleration Module

Table Of Contents

VPN Acceleration Module (VAM)

Feature Overview

Benefits

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Prerequisites

Configuration Tasks

Configuring an IKE Policy

Configuring IPSec

Creating Crypto Access Lists

Defining Transform Sets

Verifying the Configuration

Troubleshooting Tips

Monitoring and Maintaining the VPN Acceleration Module

Configuration Examples

Configuring IKE Policies Example

Configuring IPSec Configuration Example

Command Reference

show pas vam interface

show pas vam controller

crypto engine sw ipsec

Glossary

VPN Acceleration Module (VAM)

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Feature History

Release	Modification
12.1(9)E	This feature was introduced on the Cisco 7200 series routers on NPE-225, NPE-400, and NSE-1
12.1(14)E	This feature was integrated into Cisco IOS Release 12.1(14)E and support for dual VAMs1 on the Cisco 7200 series with NPE-G1 was added
12.2(9)YE	Support for this feature was added to the Cisco 7401ASR router2
12.2(13)T	This feature was integrated into Cisco IOS Release 12.2(13)T
12.2(15)T	This feature was integrated into Cisco IOS Release 12.2(15)T
12.3(1)Mainline	This feature was integrated into Cisco IOS Release 12.3(1) Mainline
12.2(14)SU	This feature was integrated into Cisco IOS Release 12.2(14)SU

1 Support for dual VAMs is available on a Cisco 7200 series router with NPE-G1 on Cisco IOS Release 12.2(15)T, 12.1(14)E, and 12.3 Mainline only. 2 The Cisco 7401ASR router is no longer sold.

This feature module describes the VPN Acceleration Module (VAM) feature. It includes the following sections:

•Feature Overview

•Supported Platforms

•Supported Standards, MIBs, and RFCs

•Prerequisites

•Configuration Tasks

•Monitoring and Maintaining the VPN Acceleration Module

•Configuration Examples

•Command Reference

•Glossary

Feature Overview

The VPN Acceleration Module (VAM) is a single-width acceleration module. It provides high-performance, hardware-assisted tunneling and encryption services suitable for Virtual Private Network (VPN) remote access, site-to-site intranet, and extranet applications. It also provides platform scalability and security while working with all services necessary for successful VPN deployments — security, quality of service (QoS), firewall and intrusion detection, service-level validation, and management. The VAM off-loads IPSec processing from the main processor, thus freeing resources on the processor engines for other tasks.

The VAM provides hardware-accelerated support for the following multiple encryption functions:

•56-bit Data Encryption Standard (DES) standard mode: Cipher Block Chaining (CBC)

•3-Key Triple DES (168-bit)

•Secure Hash Algorithm (SHA)-1 and Message Digest 5 (MD5)

•Rivest, Shamir, Adelman (RSA) public-key algorithm

•Diffie-Hellman key exchange RC4-40

Benefits

The VAM provides the following benefits:

•10 tunnels per second

•The following number of tunnels based on the corresponding memory of the NPE:

–800 tunnels for 64 MB

–1600 tunnels for 128 MB

–3200 tunnels for 256 MB

–5000 tunnels for 512 MB

•RSA encryption

•Accelerated Crypto performance

•Accelerated Internet Key Exchange (IKE)

•Certificate support for automatic authentication using digital certificates

•Dual VAM support

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Note Support for dual VAMs is available on a Cisco 7200 series router with an NPE-G1, on Cisco IOS Release 12.2(15)T, 12.1(14)E, and 12.3 Mainline.

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•Encryption services to any port adapter installed in the router. The interface on the port adapter must be configured with a crypto map to support IPSec.

•Full-duplex data transmission of over 100 Mbps with various encryption and compression schemes for 300 byte packages

•Hardware-based IPPCP LZS compression

•Network traffic compression that reduces bandwidth utilization

•Online Insertion and Removal (OIR)

•QoS, multiprotocol, and multicast feature interoperation

•Support for full Layer 3 routing, such as Enhanced Interior Gateway Routing Protocol (EIGRP), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP) across the IPSec VPN

•Up to 145 Mbps throughput using 3DES

•VPN initialization improvements

Performance Results for Single VAM

The following two tables provide performance results for a single VAM on a Cisco 7206VXR with an NPE-G1 processor, an onboard GE, and FE port adapters in slots 3 and 4.

clear_packet _size	crypto_packet_size	out_packet_size
64	96	114
300	336	354
1400	1432	1450
Mixed packet size - 344	378	396

pkt_size (bytes)	# of tunnels	measured_pps (pps)	meas_clear_ndr (Mbps)	meas_crypto_ndr (Mbps)	meas_out_ndr (Mbps)
64	4	65,224	33.39	50.09	59.48
	500	41,888	21.44	32.17	38.20
	1,000	40,480	20.73	31.09	36.92
	5,000	39,408	20.18	30.27	35.94
300	4	38,032	91.28	102.23	107.71
	500	37,184	89.24	99.95	105.31
	1,000	36,064	86.55	96.94	102.13
	5,000	36,016	86.44	96.81	101.99
1400	4	9,984	111.82	114.38	115.81
	500	9,848	110.29	112.82	114.24
	1,000	9,648	108.06	110.53	111.92
	5,000	9,616	107.70	110.16	111.55
Mixed packet size	4	31,472	86.61	95.17	99.70
	500	31,056	85.47	93.91	98.39
	1,000	30,128	82.91	91.11	95.45
	5,000	29,264	80.53	88.49	92.71

Performance Results for Dual VAMs

The following two tables provide performance results for dual VAMs on a Cisco 7206VXR with an NPE-G1 processor, an onboard GE, and FE port adapters in slots 3 and 4.

clear_packet _size	crypto_packet_size	out_packet_size
64	96	114
300	336	354
1400	1432	1450
Mixed packet size - 344	378	396

pkt_size (bytes)	# of tunnels	measured_pps (pps)	meas_clear_ndr (Mbps)	meas_crypto_ndr (Mbps)	meas_out_ndr (Mbps)
64	4	135,544	69.40	104.10	123.61
	500	61,520	31.50	47.25	56.11
	1,000	56,928	29.15	43.72	51.92
	5,000	43,744	22.40	33.60	39.89
300	4	71,336	171.21	191.75	202.02
	500	60,416	145.00	162.40	171.10
	1,000	56,016	134.44	150.57	158.64
	5,000	42,496	101.99	114.23	120.35
1400	4	18,736	209.84	214.64	217.34
	500	18,424	206.35	211.07	213.72
	1000	18,352	205.54	210.24	212.88
	5,000	18,352	205.54	210.24	212.88
Mixed packet size	4	60,416	166.26	182.70	191.40
	500	57,888	159.31	175.05	183.40
	1,000	55,488	152.70	167.80	175.79
	5,000	34,272	94.32	103.64	108.57

Related Features and Technologies

The following features and technologies are related to the VAM:

•Internet Key Exchange (IKE)

•IP Security (IPSec)

Related Documents

The following document describes the VAM hardware:

•VPN Acceleration Module Installation and Configuration

Supported Platforms

The VAM feature is supported on the following platforms:

•Cisco 7200 series routers with NPE-225, NPE-400, NSE-1, and NPE-G1

•Dual VAM support is available on a Cisco 7200 series router with an NPE-G1, on Cisco IOS Release 12.2(15)T, 12.1(14)E, and 12.3M.

•Cisco 7401ASR router

Determining Platform Support Through Cisco Feature Navigator

Cisco IOS software is packaged in feature sets that support specific platforms. To get updated information regarding platform support for this feature, access Cisco Feature Navigator. Cisco Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.

Cisco Feature Navigator is a web-based tool that enables you to determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image. You can search by feature or release. Under the release section, you can compare releases side by side to display both the features unique to each software release and the features in common.

To access Cisco Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions at http://www.cisco.com/register.

Cisco Feature Navigator is updated regularly when major Cisco IOS software releases and technology releases occur. For the most current information, go to the Cisco Feature Navigator home page at the following URL:

http://www.cisco.com/go/fn

Availability of Cisco IOS Software Images

Platform support for particular Cisco IOS software releases is dependent on the availability of the software images for those platforms. Software images for some platforms may be deferred, delayed, or changed without prior notice. For updated information about platform support and availability of software images for each Cisco IOS software release, refer to the online release notes or, if supported, Cisco Feature Navigator.

Supported Standards, MIBs, and RFCs

Standards

•No new or modified standards are supported by this feature.

MIBs

The following MIBs were introduced or modified in this feature:

•CISCO-IPSEC-FLOW-MONITOR-MIB

•CISCO-IPSEC-MIB

•CISCO-IPSEC-POLICY-MAP-MIB

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://tools.cisco.com/ITDIT/MIBS/servlet/index

If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:

http://www.cisco.com/register

RFCs

•IPPCP: RFC 2393, 2395

•IPSec/IKE: RFCs 2401-2411, 2451

Prerequisites

You must configure IPSec and IKE on the router and a crypto map to all interfaces that require encryption service from the VAM. See the "Configuration Examples" section for configuration procedures.

Configuration Tasks

On power up if the enabled LED is on, the VAM is fully functional and does not require any configuration commands. However, for the VAM to provide encryption services, you must complete the following tasks:

•Configuring an IKE Policy (required)

•Configuring IPSec (required)

Configuring an IKE Policy

If you do not specify a value for a parameter, the default value is assigned. For information on default values, refer to the "IP Security and Encryption" chapter of the Security Command Reference publication.

To configure an IKE policy, use the following commands beginning in global configuration mode:

	Command	Purpose
Step 1	Router(config)# crypto isakmp policy priority	Defines an IKE policy and enters Internet Security Association Key Management Protocol (ISAKMP) policy configuration (config-isakmp) mode.
Step 2	Router(config-isakmp)# encryption {des | 3des | aes | aes 192 | aes 256}	Specifies the encryption algorithm within an IKE policy. •des—Specifies 56-bit DES as the encryption algorithm. •3des—Specifies 168-bit DES as the encryption algorithm. •aes—Specifies 128-bit AES as the encryption algorithm. •aes 192—Specifies 192-bit AES as the encryption algorithm. •aes 256—Specifies 256-bit AES as the encryption algorithm.
Step 3	Router(config-isakmp)# authentication {rsa-sig | rsa-encr | pre-share}	(Optional) Specifies the authentication method within an IKE policy. •rsa-sig—Specifies Rivest, Shamir, and Adelman (RSA) signatures as the authentication method. •rsa-encr—Specifies RSA encrypted nonces as the authentication method. Note Beginning with Cisco IOS Release 12.3(10), rsa-encr is now enabled for VAM crypto cards. •pre-share—Specifies preshared keys as the authentication method. Note If this command is not enabled, the default value (rsa-sig) will be used.
Step 4	Router(config-isakmp)# lifetime seconds	(Optional) Specifies the lifetime of an IKE security association (SA). seconds—Number of seconds that each SA should exist before expiring. Use an integer from 60 to 86,400 seconds. Note If this command is not enabled, the default value (86,400 seconds [one day]) will be used.
Step 5	Router(config-isakmp)# hash {sha | md5}	(Optional) Specifies the hash algorithm within an IKE policy. •sha—Specifies SHA-1 (HMAC variant) as the hash algorithm. •md5—Specifies MD5 (HMAC variant) as the hash algorithm. Note If this command is not enabled, the default value (sha) will be used.
Step 6	Router(config-isakmp)# group {1 | 2 | 5}	(Optional) Specifies the Diffie-Hellman (DH) group identifier within an IKE policy. 1—Specifies the 768-bit DH group. 2—Specifies the 1024-bit DH group. 5—Specifies the 1536-bit DH group. Note If this command is not enabled, the default value (768-bit) will be used.

For detailed information on creating IKE policies, refer to the "Configuring Internet Key Exchange Security Protocol" chapter in the Security Configuration Guide publication.

Configuring IPSec

After you have completed IKE configuration, configure IPSec at each participating IPSec peer. This section contains basic steps to configure IPSec and includes the tasks discussed in the following sections:

•Creating Crypto Access Lists

•Defining Transform Sets

Creating Crypto Access Lists

To create crypto access lists, use the following commands in global configuration mode:

	Command	Purpose
Step 1	Router(config)# access-list access-list-number {deny | permit} protocol source source-wildcard destination destination-wildcard [log] or ip access-list extended name	Specifies conditions to determine which IP packets are protected.1 (Enable or disable encryption for traffic that matches these conditions.) We recommend that you configure "mirror image" crypto access lists for use by IPSec and that you avoid using the any keyword.
Step 2	Router(config-if)# Add permit and deny statements as appropriate.	Adds permit or deny statements to access lists.
Step 3	Router(config-if)# end	Exits the configuration command mode.

1 You specify conditions using an IP access list designated by either a number or a name. The access-list command designates a numbered extended access list; the ip access-list extended command designates a named access list.

For detailed information on configuring access lists, refer to the "Configuring IPSec Network Security" chapter in the Security Configuration Guide publication.

Defining Transform Sets

To define a transform set, use the following commands, starting in global configuration mode:

Command	Purpose
Router# crypto ipsec transform-set transform-set-name transform1 [transform2 [transform3]]	Defines a transform set and enters crypto transform configuration mode.
Router# mode [tunnel | transport]	Changes the mode associated with the transform set. The mode setting is applicable only to traffic whose source and destination addresses are the IPSec peer addresses; it is ignored for all other traffic. (All other traffic is in tunnel mode only.)
Router# end	Exits the crypto transform configuration mode to enabled mode.
Router# clear crypto sa or clear crypto sa peer {ip-address | peer-name} or clear crypto sa map map-name or clear crypto sa spi destination-address protocol spi	Clears existing IPSec security associations so that any changes to a transform set take effect on subsequently established security associations (SAs). (Manually established SAs are reestablished immediately.) Using the clear crypto sa command without parameters clears out the full SA database, which clears out active security sessions. You might also specify the peer, map, or entry keywords to clear out only a subset of the SA database.

To create crypto map entries that use IKE to establish the security associations, use the following commands, starting in global configuration mode:

Command	Purpose
Router# crypto map map-name seq-num ipsec-isakmp	Creates the crypto map and enters crypto map configuration mode.
Router# match address access-list-id	Specifies an extended access list. This access list determines which traffic is protected by IPSec and which is not.
Router# set peer {hostname | ip-address}	Specifies a remote IPSec peer. This is the peer to which IPSec-protected traffic can be forwarded. Repeat for multiple remote peers.
Router# set transform-set transform-set-name1 [transform-set-name2...transform-set-name6]	Specifies which transform sets are allowed for this crypto map entry. Lists multiple transform sets in order of priority (highest priority first).
Router# end	Exits crypto map configuration mode.

Repeat these steps to create additional crypto map entries as required.

For detailed information on configuring crypto maps, refer to the "Configuring IPSec Network Security" chapter in the Security Configuration Guide publication.

Verifying the Configuration

The following steps provide information on verifying your configurations:

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Step 1 Enter the show crypto ipsec transform-set command to view your transform set configuration:

Router# show crypto ipsec transform-set 

Transform set combined-des-md5: {esp-des esp-md5-hmac} 

   will negotiate = {Tunnel,}, 

Transform set t1: {esp-des esp-md5-hmac} 

   will negotiate = {Tunnel,}, 

Transform set t100: {ah-sha-hmac} 

   will negotiate = {Transport,}, 

Transform set t2: {ah-sha-hmac} 

   will negotiate = {Tunnel,}, 

   {esp-des} 

   will negotiate = {Tunnel,},  

Step 2 Enter the show crypto map [interface interface | tag map-name] command to view your crypto map configuration:

outer# show crypto map

Crypto Map: "router-alice" idb: Ethernet0 local address: 172.21.114.123

Crypto Map "router-alice" 10 ipsec-isakmp

        Peer = 172.21.114.67

        Extended IP access list 141

            access-list 141 permit ip 

                source: addr = 172.21.114.123/0.0.0.0

                dest:   addr = 172.21.114.67/0.0.0.0

        Current peer: 172.21.114.67

        Security-association lifetime: 4608000 kilobytes/120 seconds

        PFS (Y/N): N

        Transform sets={t1,} 

Step 3 Enter the show crypto ipsec sa [map map-name | address | identity | detail | interface] command to view information about IPSec security associations.

Router# show crypto ipsec sa

interface: Ethernet0

    Crypto map tag: router-alice, local addr. 172.21.114.123

   local ident (addr/mask/prot/port): (172.21.114.123/255.255.255.255/0/0)

   remote ident (addr/mask/prot/port): (172.21.114.67/255.255.255.255/0/0)

    current_peer: 172.21.114.67

     PERMIT, flags={origin_is_acl,}

    #pkts encaps: 10, #pkts encrypt: 10, #pkts digest 10

    #pkts decaps: 10, #pkts decrypt: 10, #pkts verify 10

    #send errors 10, #recv errors 0

     local crypto endpt.: 172.21.114.123, remote crypto endpt.: 172.21.114.67

     path mtu 1500, media mtu 1500

     current outbound spi: 20890A6F

     inbound esp sas:

      spi: 0x257A1039(628756537)

        transform: esp-des esp-md5-hmac,

        in use settings ={Tunnel,}

        slot: 0, conn id: 26, crypto map: router-alice

        sa timing: remaining key lifetime (k/sec): (4607999/90)

        IV size: 8 bytes

        replay detection support: Y

     inbound ah sas:

     outbound esp sas:

      spi: 0x20890A6F(545852015)

        transform: esp-des esp-md5-hmac,

        in use settings ={Tunnel,}

        slot: 0, conn id: 27, crypto map: router-alice

        sa timing: remaining key lifetime (k/sec): (4607999/90)

        IV size: 8 bytes

        replay detection support: Y

     outbound ah sas:

interface: Tunnel0

   Crypto map tag: router-alice, local addr. 172.21.114.123

   local ident (addr/mask/prot/port): (172.21.114.123/255.255.255.255/0/0)

   remote ident (addr/mask/prot/port): (172.21.114.67/255.255.255.255/0/0)

   current_peer: 172.21.114.67

     PERMIT, flags={origin_is_acl,}

    #pkts encaps: 10, #pkts encrypt: 10, #pkts digest 10

    #pkts decaps: 10, #pkts decrypt: 10, #pkts verify 10

    #send errors 10, #recv errors 0

     local crypto endpt.: 172.21.114.123, remote crypto endpt.: 172.21.114.67

     path mtu 1500, media mtu 1500

     current outbound spi: 20890A6F

     inbound esp sas:

      spi: 0x257A1039(628756537)

        transform: esp-des esp-md5-hmac,

        in use settings ={Tunnel,}

        slot: 0, conn id: 26, crypto map: router-alice

        sa timing: remaining key lifetime (k/sec): (4607999/90)

        IV size: 8 bytes

        replay detection support: Y

     inbound ah sas:

     outbound esp sas:

      spi: 0x20890A6F(545852015)

        transform: esp-des esp-md5-hmac,

        in use settings ={Tunnel,}

        slot: 0, conn id: 27, crypto map: router-alice

        sa timing: remaining key lifetime (k/sec): (4607999/90)

        IV size: 8 bytes

        replay detection support: Y

     outbound ah sas: 

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Troubleshooting Tips

To verify that Cisco IOS software has recognized VAM, enter the show diag command and check the output. For example, when the router has the VAM in slot 1, the following output appears:

Router# show diag 1

    Slot 1:

    	    VAM Encryption/Compression engine. Port adapter

    	    Port adapter is analyzed 

    	    Port adapter insertion time 00:04:45 ago

    	    EEPROM contents at hardware discovery:

    	    Hardware Revision        :1.0

    	    PCB Serial Number        :15485660

    	    Part Number              :73-5953-04

    	    Board Revision           :

    	    RMA Test History         :00

    	    RMA Number               :0-0-0-0

    	    RMA History              :00

    	    Deviation Number         :0-0

    	    Product Number           :CLEO                

    	    Top Assy. Part Number    :800-10496-04

    	    CLEI Code                :

    	    EEPROM format version 4

    	    EEPROM contents (hex):

    	      0x00:04 FF 40 02 8A 41 01 00 C1 8B 31 35 34 38 35 36

    	      0x10:36 30 00 00 00 82 49 17 41 04 42 FF FF 03 00 81

    	      0x20:00 00 00 00 04 00 80 00 00 00 00 CB 94 43 4C 45

    	      0x30:4F 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20

    	      0x40:20 C0 46 03 20 00 29 00 04 C6 8A FF FF FF FF FF

    	      0x50:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

    	      0x60:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

    	      0x70:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

To see if the VAM is currently processing crypto packets, enter the show pas vam interface command. The following is sample output:

    Router# show pas vam interface 

    Interface VAM 1/1 :

    	    ds:0x632770C8        idb:0x62813728

    	    Statistics of packets and bytes that through this interface:

    		    18 packets in                     18 packets out

    		  2268 bytes in                     2268 bytes out

    		     0 paks/sec in                     0 paks/sec out

    		     0 Kbits/sec in                    0 Kbits/sec out

    		    83 commands out                   83 commands acknowledged

    	    ppq_full_err   :0            ppq_rx_err       :0    

    	    cmdq_full_err  :0            cmdq_rx_err      :0    

    	    no_buffer      :0            fallback         :0    

    	    dst_overflow   :0            nr_overflow      :0    

    	    sess_expired   :0            pkt_fragmented   :0    

    	    out_of_mem     :0            access_denied   :0    

    	    invalid_fc     :0            invalid_param    :0    

    	    invalid_handle :0            output_overrun   :0    

    	    input_underrun :0            input_overrun    :0    

    	    key_invalid    :0            packet_invalid   :0    

    	    decrypt_failed :0            verify_failed    :0    

    	    attr_invalid   :0            attr_val_invalid :0    

    	    attr_missing   :0            obj_not_wrap     :0    

    	    bad_imp_hash   :0            cant_fragment    :0    

    	    out_of_handles :0            compr_cancelled  :0    

    	    rng_st_fail    :0            other_errors     :0    

    	    633 seconds since last clear of counters

When the VAM processes packets, the "packet in" and "packet out" counters change. Counter "packets out" represents the number of packets directed to the VAM. Counter "packets in" represents the number of packets received from the VAM.

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Note In versions prior to Cisco IOS Release 12.2(5)T and Cisco IOS Release 12.1(10)E, upon reboot trap configurations are lost and need to be re-entered.

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Monitoring and Maintaining the VPN Acceleration Module

Use the commands below to monitor and maintain the VPN Acceleration Module:

Command	Purpose
Router# show pas isa interface	Displays the ISA interface configuration.
Router# show pas isa controller	Displays the ISA controller configuration.
Router# show pas vam interface	Verifies the VAM is currently processing crypto packets.
Router# show pas vam controller	Displays the VAM controller configuration.
Router# Show version	Displays integrated service adapter as part of the interfaces.

Configuration Examples

This section provides the following configuration examples:

•Configuring IKE Policies Example

•Configuring IPSec Configuration Example

Configuring IKE Policies Example

In the following example, two IKE policies are created, with policy 15 as the highest priority, policy 20 as the next priority, and the existing default priority as the lowest priority. It also creates a preshared key to be used with policy 20 with the remote peer whose IP address is 192.168.224.33.

crypto isakmp policy 15

 encryption 3des

 hash md5

 authentication rsa-sig

 group 2

 lifetime 5000

crypto isakmp policy 20

 authentication pre-share

 lifetime 10000

crypto isakmp key 1234567890 address 192.168.224.33

Configuring IPSec Configuration Example

The following example shows a minimal IPSec configuration where the security associations will be established via IKE:

An IPSec access list defines which traffic to protect:

access-list 101 permit ip 10.0.0.0 0.0.0.255 10.2.2.0 0.0.0.255 

A transform set defines how the traffic will be protected. In this example, transform set "myset1" uses DES encryption and SHA for data packet authentication:

crypto ipsec transform-set myset1 esp-des esp-sha 

Another transform set example is "myset2," which uses Triple DES encryption and MD5 (HMAC variant) for data packet authentication:

crypto ipsec transform-set myset2 esp-3des esp-md5-hmac 

A crypto map joins together the IPSec access list and transform set and specifies where the protected traffic is sent (the remote IPSec peer):

crypto map toRemoteSite 10 ipsec-isakmp

 match address 101

 set transform-set myset2

 set peer 10.2.2.5

The crypto map is applied to an interface:

interface Serial0

 ip address 10.0.0.2

 crypto map toRemoteSite

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Note In this example, IKE must be enabled.

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Command Reference

This section documents new commands. All other commands used with this feature are documented in the Cisco IOS Release 12.2 command reference publications.

•show pas vam interface

•show pas vam controller

•crypto engine sw ipsec

show pas vam interface

To display interface information that is specific to the VAM, use the show pas vam interface command in privileged EXEC mode.

show pas vam interface

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

Privileged EXEC

Command History

Release	Modification
12.1(9)E	This command was introduced in Cisco IOS Release 12.1(9)E.
12.2(9)YE	This command was integrated in Cisco IOS Release 12.2(9)YE.
12.2(13)T	This feature was integrated into Cisco IOS Release 12.2(13)T.
12.2(14)S	This feature was integrated into Cisco IOS Release 12.2(14)S.

Usage Guidelines

Enter the show pas vam interface command to see if the VAM is currently processing crypto packets.

Examples

The following example is output from the show pas vam interface command:

Router# show pas vam interface 

    Interface VAM 1/1 :

            ds:0x632770C8        idb:0x62813728

            Statistics of packets and bytes that through this interface:

                    18 packets in                     18 packets out

                  2268 bytes in                     2268 bytes out

                     0 paks/sec in                     0 paks/sec out

                     0 Kbits/sec in                    0 Kbits/sec out

                    83 commands out                   83 commands acknowledged

            ppq_full_err   :0            ppq_rx_err       :0    

            cmdq_full_err  :0            cmdq_rx_err      :0    

            no_buffer      :0            fallback         :0    

            dst_overflow   :0            nr_overflow      :0    

            sess_expired   :0            pkt_fragmented   :0    

            out_of_mem     :0            access_denied   :0    

            invalid_fc     :0            invalid_param    :0    

            invalid_handle :0            output_overrun   :0    

            input_underrun :0            input_overrun    :0    

            key_invalid    :0            packet_invalid   :0    

            decrypt_failed :0            verify_failed    :0    

            attr_invalid   :0            attr_val_invalid :0    

            attr_missing   :0            obj_not_wrap     :0    

            bad_imp_hash   :0            cant_fragment    :0    

            out_of_handles :0            compr_cancelled  :0    

            rng_st_fail    :0            other_errors     :0 

Related Commands

Command	Description
show pas isa interface	Displays pas isa interface statistics for incoming packets.

show pas vam controller

To display controller information that is specific to the VAM, use the show pas vam controller command in privileged EXEC mode.

show pas vam controller

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

Privileged EXEC

Command History

Release	Modification
12.1(9)E	This command was introduced in Cisco IOS Release 12.1(9)E.
12.2(9)YE	This command was integrated into Cisco IOS Release 12.2(9)YE.
12.2(13)T	This feature was integrated into Cisco IOS Release 12.2(13)T.
12.2(14)S	This feature was integrated into Cisco IOS Release 12.2(14)S.

Usage Guidelines

Use the show pas vam controller command to display controller information that is specific to the VAM.

Examples

The following example is output from the show pas vam controller command:

Router# show pas vam controller

Encryption Mode = IPSec

Addresses of Rings and instance structure:

Low Priority Queue:

    OMQ=0xF2CB2E0, OMQ Shadow = 0x630E6638, {1, 1, 0, 256}

    PKQ=0xF2CF320, PKQ Shadow = 0x630EBE64, {232, 232, 0, 256}

    ERQ=0xF2D3360, ERQ Shadow = 0x630F1690, {0, 0, 0, 256}

High Priority Rings:

   TX: 0x0F2D73A0 TX Shadow:0x630F6EBC, {6, 6, queued=0}

   RX: 0x7F2D93E0 {13, 0, 256}

   RX Pool:0x7F2DA420 RX Pool Shadow:0x630FCAE8, {6, 0, 255}

Instance Structure address:0x630E5898

Misc registers:

mini-omq=0xF2DB460, shdw=0x63102714

Group0=0x3D800000, Group1=0x3D801000

IndexReg = 0xDFFE700

Heartbeat info:<Addr, Value> = <0xF2DB520, 0x2A55A>

Running default HSP (addr=0x629D36AC, size=294268)

Related Commands

Command	Description
show pas isa controller	Displays controller information specific to the VPN Acceleration card.

crypto engine sw ipsec

In the event of a hardware failure, use the [no] crypto engine sw ipsec command in privilege EXEC mode, to prevent the Cisco IOS software from IPSec/IKE processing of crypto packets.

crypto engine sw ipsec

[no] crypto engine sw ipsec

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

Privileged EXEC

Command History

Release	Modification
12.1(20)E	This command was introduced in Cisco IOS Release 12.1(20)E.
12.3(1)Mainline	This command was integrated in Cisco IOS Release 12.3(1)Mainline.

Usage Guidelines

Enter the [no] crypto engine sw ipsec command to stop the Cisco IOS software from processing crypto packets after a hardware failure.

Examples

The following example is output from the[no] crypto engine sw ipsec command:

Related Commands

Command	Description

Glossary

VAM—VPN Acceleration Module.

IKE—Internet Key Exchange. IKE establishes a shared security policy and authenticates keys for services (such as IPSec) that require keys. Before any IPSec traffic can be passed, each router/firewall/host must verify the identity of its peer. This can be done by manually entering preshared keys into both hosts or by a CA service.

IPSec—IP Security. A framework of open standards that provides data confidentiality, data integrity, and data authentication between participating peers. IPSec provides these security services at the IP layer. IPSec uses IKE to handle the negotiation of protocols and algorithms based on local policy and to generate the encryption and authentication keys to be used by IPSec. IPSec can protect one or more data flows between a pair of hosts, between a pair of security gateways, or between a security gateway and a host.