Default is 24 MB and is expandable to 32 MB. The following sample output from the show version command indicates the version number on the second output line:. Additional command output lines include more information, such as processor revision numbers, memory amounts, hardware IDs, and partition information. If you have a Cisco. Software Center: Cisco IOS Software: Product Bulletins: General System Software Bulletins: You can also reach the Cisco IOS Upgrade Planner , which allows you more flexibility to browse for your preferred software, by going to www.

IOS Upgrade Planner. The Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform. Each feature set contains a specific set of Cisco IOS features. Note These feature set tables only contain a selected list of features. These tables are not cumulative—nor do they list all the features in each image. Information is included for any changed or new command line interface CLI commands associated with the new features. Enabling this automatic configuration works in conjunction with network access server commands that prevent a peer from receiving a negative acknowledgement containing addresses for the peer to use , in response to an IP Control Protocol IPCP configuration peer request with non-zero addresses in the DNS and WINS options.

This feature has three requirements:. Perform the following steps to configure your router to use IPCP subnet masks. For example:. The command import all imports the DHCP option parameters. The command origin ipcp configures the origin of the pool. Step 2 Assign the Ethernet interface IP address using the command ip address pool poolname. Step 3 Configure the dialer interface in the configuration interface command mode as follows:. Assign an IP address:.

Set the IPCP negotiation parameters:. The SA Agent is an application-aware synthetic operation agent that monitors network performance by measuring key metrics such as response time, availability, jitter interpacket delay variance , connect time, throughput, and packet loss. This feature is intended to provide support for Service Level Agreement SLA reporting functionality of the Cisco VPN Solution Center, but can also be used for troubleshooting, for analysis before problems occur, and for designing future network topologies. Secure Shell SSH is a protocol that provides a secure, remote connection to a router.

This connection provides functionality similar to an inbound Telnet connection. Before SSH, security was limited to Telnet security. Note NOTE: The SSH Client is not implemented. You can identify IP access lists with an alphanumeric string a name rather than a number. Named access lists allow you to configure more IP access lists in a router than using numbered access lists. This URL is subject to change without notice.

If it changes, point your web browser to Cisco. Technical Documents: Documentation Home Page: Cisco IOS Release Also, see the "Caveats" section. When weighted fair queuing WFQ is used on the Dialer interface, or when WFQ is used in the default class of a service policy, the following parameters need to be set to the values shown because of the limited amount of memory on the router:. For example, if you apply WFQ to the Dialer interface, you need to configure it as follows:. In this example, the command fair-queue 64 64 0 limits the number of conversations to 64, and sets the discard threshold to The command hold-queue 64 out limits the maximum number of output packets to In another example, if you configure a service policy, and WFQ is used on the default class, you need to configure the policy as follows:.

Here, the command fair-queue 64 limits the number of conversations to 64, and the command queue-limit 64 sets the discard threshold to To run IPSec successfully, the Cisco series router clock needs to be set accurately. For best results, set up a Network Time Protocol NTP server to periodically send time information messages to Cisco series routers.

See the SNTP configuration and command reference documentation for configuration instructions.

Cisco IOS 15.2S

The Cisco router connects small professional offices over serial lines to corporate networks and to the Internet. Default is 12 MB and is expandable to 20 MB. Additional memory can be added using Flash cards. Default is 24 MB and is expandable to 32 MB. The following sample output from the show version command indicates the version number on the second output line:. The Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform.

Each feature set contains a specific set of Cisco IOS features. Note These feature set tables only contain a selected list of features. These tables are not cumulative—nor do they list all the features in each image. Using this feature, you can identify IP access lists with an alphanumeric string a name rather than a number.

Named access lists enable you to configure more IP access lists in a router than numbered access lists. Information is included for any changed or new command line interface CLI commands associated with the new features. CAR can be used to rate-limit traffic based on certain matching criteria such as incoming interface, IP precedence, QoS group, or IP access list criteria.

CAR provides configurable actions, such as transmit, drop, set precedence, or set QoS group, when traffic conforms to or exceeds the rate limit. This URL is subject to change without notice. If it changes, point your web browser to Cisco. Technical Documents: Release Also, see the "Caveats" section. The syntax of the ip adjust-mss command has changed to the following command syntax:. When weighted fair queuing WFQ is used on the Dialer interface, or when WFQ is used in the default class of a service policy, the following parameters need to be set to the values shown because of the limited amount of memory on the router:.

For example, if you apply WFQ to the Dialer interface, configure it as follows:. In this example, the command fair-queue 64 64 0 limits the number of conversations to 64, and sets the discard threshold to The command hold-queue 64 out limits the maximum number of output packets to In another example, if you configure a service policy, and WFQ is used on the default class, configure the policy as follows:. Here, the command fair-queue 64 limits the number of conversations to 64, and the command queue-limit 64 sets the discard threshold to To run IPSec successfully, the Cisco series router clock needs to be set accurately.

For best results, set up a Network Time Protocol NTP server to periodically send time information messages to Cisco series routers. See the SNTP configuration and command reference documentation for configuration instructions. If you do not have an NTP server, you must reset the Cisco series router clock using the command clock set each time you restart the router. The CiscoView application supports the Cisco series routers. The CiscoView application provides dynamic status, statistics, and comprehensive configuration information for Cisco switches, routers, concentrators, and adapters.

It displays a graphical view of Cisco devices. This network management tool also provides configuring and monitoring functions and offers basic troubleshooting tips. Before attempting to download new images, you must first delete files in the router Flash memory. Be sure to u se the delete command, not command erase , to free up space. Entering erase removes all files, including the configuration. Multilink PPP fragments large data packets so that small voice packets can be interleaved within them. Currently, NAT does not support alerting H. Therefore, NAT communication cannot be established between the router end points.

NAT support for H. This release supports the setting of 1 only, for the ROM monitor set stop-bits parameter. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels. Note If you have an account with Cisco. To reach the Bug Toolkit, log in toCisco. Technical Assistance Center: Tool Index: To assign a different access list to the encryption map, follow the steps below:.

Step 1 Remove the old access list assigned to the existing encryption map:. Step 2 Before defining the new access list, assign the new access list to the encryption map:. Step 3 If the newly-configured access list in the encryption map is already defined, remove the access list from the encryption map prior to defining the new access list.

Entering the ROM Monitor

Step 4 Define the new access list and ensure it is referenced in the encryption map. Enabling fast switching has no effect when using PPPoE. The router continues to process-switch all traffic. To work around this problem, specify dialer-group 1 under the dialer interface to allow packets to be fast switched correctly for PPPoE.

There are two types of authentication used with PPPoE. Both CHAP and PAP authenticate a remote system by comparing the username and password offered by the remote system with the username and password in the local configuration file. The administrators for both ends of a connection must provide each other with the usernames and passwords for their respective systems before administrators can place the usernames and passwords for remote systems in local configuration files. Step 19 on page shows you one method of specifying the CHAP authentication protocol, as follows:.


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Step 19 Set the PPP authentication method. To use a different hostname and password when the router is authenticated, add them to the CHAP configuration. To provide an alternate hostname and password to use during CHAP authentication, perform the following steps after step Step 22 Exit router configuration mode. When two devices use CHAP authentication, each side sends out a challenge and the opposite sides respond by sending out their username and password. Each side authenticates the other independently.

Use the following procedure to configure one-way authentication. Note The callin keyword is added to the ppp authentication chap command for this example. The following configuration example shows a PPPoE configuration. This example also shows the use of one-way CHAP authentication with an alternate hostname and password to answer a challenge from a remote system.

It includes the Ethernet 0 and Ethernet 1 configurations as well as the Dialer configuration. Typically, these documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents. Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online on Cisco. The following documents are specific to Release They are located on Cisco. Release Notes: Cross-Platform Release Notes.

Cisco Product Documentation: To reach these documents from Cisco.

Cisco IOS S - Support & Downloads - Cisco

Product Bulletins. Access Servers and Access Routers: Fixed Configuration Access Routers: Cisco Router.

Router Configuration Tools: Feature modules describe new features supported by Release A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set. New Feature Documentation: New Features in Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a particular set of features and which features are supported in a particular Cisco IOS image.

Feature Navigator is available 24 hours a day, 7 days a week. To access Feature Navigator, you must have an account on Cisco.