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Expiration of the timeout causes incoming calls to return a disconnect code to the caller. This mechanism provides protection against hung calls for inbound calls received over interfaces such as foreign exchange office FXO that do not have forward-disconnect supervision. The show ephone command has been enhanced to display the following:. Diagnostic messages are added to the system log whenever a phone registers or unregisters from Cisco SRST. For conferencing to be available, an IP phone must have a minimum of two lines connected to one or more buttons.

Several international languages and call-progress tone sets are newly supported. There are approximately 10 new and modified commands. This feature implements the downloading of region-specific tones and the associated frequencies, amplitudes, and cadences using XML-based configuration files during gateway registration.

The feature supports dual tones and sequential tones. Cisco CallManager performs signal and call processing. When Cisco CallManager requests a specific tone, the gateway references the custom tone table associated with the network locale of the voice port. When the gateway registers to Cisco CallManager, or if the gateway restarts or resets, the network locale for each port is downloaded to the gateway.

Once the custom tone specification is downloaded to the gateway, it can also be used in H. Only one gateway supports the download of up to two custom tones, that is, no more than two custom tone tables will be downloaded to one gateway even if there are more that two countries or regions configured for the gateway.

The G. All other platforms continue to use the Cisco-proprietary ms EC by default. Supports new standard. IEEE BackboneFast provides fast convergence in the network backbone after a spanning-tree topology change occurs. Internet Group Management Protocol IGMP snooping constrains the flooding of multicast traffic by dynamically configuring the interfaces so that multicast traffic is forwarded only to those interfaces associated with IP multicast devices.

Per-port storm control prevents broadcast, multicast, and unicast storms. Per-port storm-control uses rising and falling thresholds to block and then restore the forwarding of broadcast, unicast, or multicast packets.

You can also set the switch to shut down the port when the rising threshold is reached. A routed port is a physical port that acts like a port on a router; it does not have to be connected to a router. A routed port is not associated with a particular VLAN, as is an access port. A routed port behaves like a regular router interface, except that it does not support subinterfaces. Routed ports can be configured with a Layer 3 routing protocol. Fallback bridging forwards traffic that the multilayer switch does not route and forwards traffic belonging to a nonroutable protocol such as DECnet.

There are 47 new Cisco IOS commands that support the feature enhancements. For additional information on the feature enhancements, also refer to the and Port Ethernet Switch Module for Cisco Series, Cisco Series, and Cisco Series feature module at:.

Should connection to the primary call manager fail, call processing reverts to a backup call manager until the connection to the primary is restored. Should connections to the primary and all backups fail, call processing reverts to H. When a connection is restored, call processing reverts to the primary or other available call manager and to MGCP.

You need a supported Cisco series, Cisco series, or Cisco series router equipped with the following:. You need one or more Cisco CallManager systems, Version 3. This feature delivers Private Line Automatic Ringdown for the connection of turrets for the financial industry—primarily for corporations and enterprises that use turrets and POTS telephones for trading.

Implementation of this feature ensures that a call between traders on a PLAR connection will be maintained if one of the traders goes on-hook or on-hold. This new capability also ensures that bandwidth is used only when needed. For additional feature and configuration information, refer to the Private Line Automatic Ringdown for Trading Turrets feature module at:.

When a voice port is configured with an incorrect destination number that may or may not be a valid number, the call may not perform as expected. There is no cross-checking for turret PLAR from the origination voice port, but there is a check on the terminating voice port to prevent accepting a call from a calling party that is not preconfigured. These network modules provide the ability to directly connect the PSTN and legacy telephony equipment to Cisco XM series, Cisco series, and Cisco series modular access routers, enabling important applications such as IP telephony, toll bypass, and full gateway integration.

These network modules support the following interface cards:. Features supported in this release include the following:. In addition to continuing support for configuring a fixed number of channels per DSP, the flex option enables the DSP to handle a flexible number of channels.

The total number of supported channels varies from 6 to 16, depending on which codec is used for a call. All the signaling is transparently sent between the analog voice port and DS0 time slot, and will not be seen by the higher layer voice software. The following Cisco IOS commands are introduced or modified to support this feature:. Cisco IOS software images are subject to deferral. Cisco recommends that you view the deferral notices at the following location to determine if your software release is affected:.

For general information about the types of documents listed in this section, refer to the following documents:. Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.

Severity 3 caveats are moderate caveats, and only selected severity 3 caveats are included in the caveats document. This section contains open and resolved caveats for the current Cisco IOS maintenance release. These documents lists severity 1 and severity 2 caveats and only selected severity 3 caveats, and are located on Cisco.

Caveat numbers and brief descriptions for Release Note If you have an account on Cisco. To reach the Bug Toolkit, l og in to Cisco. This section describes only severity 1 and 2 caveats and select severity 3 caveats. Symptoms: V. Conditions: This symptom is observed on V. High-speed modem connections V. The successful exploitation enables an adversary to reset any established TCP connection in a much shorter time than was previously discussed publicly. Depending on the application, the connection may get automatically re-established.

In other cases, a user will have to repeat the action for example, open a new Telnet or SSH session. Depending upon the attacked protocol, a successful attack may have additional consequences beyond terminated connection which must be considered. This attack vector is only applicable to the sessions which are terminating on a device such as a router, switch, or computer and not to the sessions that are only passing through the device for example, transit traffic that is being routed by a router.

In addition, this attack vector does not directly compromise data integrity or confidentiality. All Cisco products which contain TCP stack are susceptible to this vulnerability. Symptoms: A router may reload unexpectedly because of a bus error when it accesses a low address during the translation of TCP port Symptoms: A router may reload unexpectedly after it attempts to access a low memory address. Conditions: This symptom is observed after ACLs have been updated dynamically or after the router has responded dynamically to an IDS signature.

Symptoms: A caller doing a blind transfer sees the error message, "Unable to transfer" on their IP phone even though the destination is ringing. This might affect the interoperablity between a call manager and IPIP gateway. Symptoms: A voice gateway incorrectly matches the wrong outbound dial-peer using called number digits collected from INFO messages. The dial-peer mismatch occurs when the initial interdigit timeout expires because incorrect called number digits are used to find a matching dial-peer.

Conditions: This happens when the enhanced default application is used on the terminating gateway and the terminating gateway receives a PROGRESS message with an inband progress indicator. Workaround: Configure the "default. Cisco products running IOS contain vulnerabilities in the processing of H. A test suite has been developed by the University of Oulu to target this protocol and identify vulnerabilities.

Support for the H. The vulnerabilities can be exploited repeatedly to produce a denial of service DoS. There are workarounds available that may mitigate the impact, but these techniques may not be appropriate for use in all customer networks. Symptoms: Ringback is not heard on the originating phone when a blind transfer is initiated. Once the call is established with the destination, the destination party transfers the originating party to another destination.

During this transfer, the originating party should hear the ringing for the destination. Symptoms: A Cisco router that has a voice feature such as H. Conditions: This symptom is observed on a Cisco series but may also occur on other routers.

Workaround: Turn off "ip nat service hall" or move to This should make the router send RSIP:restart to the call agent. Further Problem Description: A call setup without an incoming call leg results in a H. Enter set callinfo newguid to force the call setup to generate new conferenceID and callIdentifier fields. This assumes that the generated GUID does not affect the billing system or the remote endpoint.

The symptom occurs when the following debug privileged EXEC commands are enabled:. Symptoms: Onboard framer misses the first FDL request. PRM transmission to CO timing is wrong. After that, the Cisco IAD operates correctly. Conditions: On the terminating gateway's TGW incoming dial-peer configuration, define a progess indicator for the connect event by using progress-ind connect enable 8. Symptoms: The user is disconnected without any busy tones when transferred to unreachable destination.

Instead, it hears a fastballs and displays unknown number. Conditions: This behavior can occur when the transferee and transfer-to endpoints are attached to the same gateway and the transfer is committed during alerting. Symptoms: The remote party display information is not updated properly after a call transfer. IP Phone B1 correctly displays "Private. IP Phone A2 answers. On IP Phone A1 there are 2 displays:. To IP Phone B1. On pressing transfer:. Conditions: This behavior occurs when the default session application is set to process the call.

Workaround: Configure the application session command on the incoming dial-peer. Symptoms: The ringback tone provided during alerting and the fast busy tone provided at the end of the call is not as per the cptone configured on the gateway under the voice-port. A rare sequence of crafted IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the input queue is full.

No authentication is required to process the inbound packet. Processing of IPv4 packets is enabled by default. Devices running only IP version 6 IPv6 are not affected. A workaround is available. Symptoms: Caller reaches original destination's voicemail when forwarded-to destination is not available.

Conditions: If a call is forwarded across multiple IP phones, the voicemail box selected is that of the originally called number. For example: A calls B and the call is forwarded to C. C does not answer and the call gets forwarded to B's voice mail instead of C's voicemail. Symptoms: The Release Sources reported in the radius accounting record or the gateway's call history record for the incoming and outgoing legs don't match.

This behavior does not affect the voice call. Conditions: This behavior may occur when the default voice application handles the incoming call. Workaround: Configure the application default. Symptoms: The wrong cause value is provided when transferring a call to an unallocated or busy destination.

Conditions: This behavior can occur when an incoming call VoIP call is handled by the app-htransfer. The gateway will place an outbound VoIP call instead of disconnecting the incoming call with the appropriate cause code under the following two conditions:. In this case, the final cause value returned to the incoming call will depend on the outgoing call setup request.

Symptoms: Transfer-with-consultation does not work properly with ITS. Blind transfer still works. Workaround: Disable transfer-with-consultation on the ITS when handling the phone. Use blind transfer only with the in ITS. Conditions: These symptoms are observed when the following two conditions occur:. The line rate is the maximum speed allowed by the digital subscriber line access multiplexer [DSLAM].

Further Problem Description: The show interface atm command indicates the 'packets input' counter not incrementing but the show controller atm command indicates the 'Total Rx' counter is incrementing. Symptoms: For users using an NM-HDA FXS voice-port, if user picks up the phone during the ring-on cycle, user will hear a high pitch sound distorted ringing until ring-off.

If user picks up the phone during the ring-off cycle, this problem will not occur. Workaround: Configure the application session. Symptoms: The gateway may reload when an IP phone transfers a call. Symptoms: The ringback tone provided during alerting, and the fast busy tone provided at the end of the call is not as per the cptone configured on the gateway under the voice-port.

The gateway places an outbound VoIP call instead of disconnecting the incoming call with the appropriate cause code under the following two conditions:. In this case, the final cause value returned to the incoming call depends on the outgoing call setup request. Symptoms: Changing a routed port back to a L2 port causes a serial interface to be left configured with the IP unnumbered command while the routed port interface no longer exists.

Then change back the routed port to L2 port switched port. Symptoms: Incomplete Storm control CLI will switch configuration mode to global mode rather than per port Storm control configuration mode. Conditions: Configuring the no storm-control command in interface configuration mode. Workaround: Use the no storm-control broadcast unicast multicast command instead of just the no storm-control command in interface configuration mode.

Symptoms: Routed port does not fast-wswitch IP traffic although router is configured for IP fast-switching. Symptoms: Output of the show isdn status command doesn't display the isdn status information of all the isdn interfaces. Conditions: The problem appears only when one of the interfaces is configured with a switch type of primary-dpnss.

Symptoms: Routed port converted back to L2 switchport and used as stacking partner retains OSPF configuration as seen in show ip ospf interface. Conditions: Change a routed port to L2 switchport without explicitly removing IP address. Symptoms: Fails to bring link UP UP when configured to speed 10 and adjacent router's on-board fe is configured to speed auto.

Also displays wrong message about the link changing state to UP UP. The PGW does not do anything, and no call trace is created. Either the PGW does not handle the virtual call or the packet is malformed. Symptoms: Router crashes when pri-group is unconfigured on the controller using the no pri-group timeslots command.

The following sections describe the documentation available for the Cisco and Cisco modular access routers. These documents consist of hardware and software installation guides, Cisco IOS configuration guides and command references, system error messages, and other documents.

Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online on Cisco. Use these release notes with these documents:. These documents are available for the Cisco and Cisco modular access routers on Cisco. 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. Cisco IOS software is packaged in feature sets that are supported on 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 quickly 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. Each module in the Cisco IOS documentation set consists of one or more configuration guides and one or more corresponding command references. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and contain comprehensive configuration examples.

Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference. These electronic documents may contain updates and modifications made after the paper documents were printed. From Cisco. Cisco provides several ways to obtain documentation, technical assistance, and other technical resources. These sections explain how to obtain technical information from Cisco Systems.

You can submit comments electronically on Cisco. In the Cisco Documentation home page, click the Fax or Email option in the "Leave Feedback" section at the bottom of the page. You can submit your comments by mail by using the response card behind the front cover of your document or by writing to the following address:. For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the Cisco Technical Assistance Center TAC provides hour-a-day, award-winning technical support services, online and over the phone.

If you do not hold a valid Cisco service contract, please contact your reseller. The Cisco TAC website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco TAC website is available 24 hours a day, days a year. P3 and P4 cases are those in which your network is minimally impaired or for which you require product information.

After you describe your situation, the TAC Case Open Tool automatically recommends resources for an immediate solution. If your issue is not resolved using the recommended resources, your case will be assigned to a Cisco TAC engineer. For P1 or P2 cases P1 and P2 cases are those in which your production network is down or severely degraded or if you do not have Internet access, contact Cisco TAC by telephone.

Cisco TAC engineers are assigned immediately to P1 and P2 cases to help keep your business operations running smoothly. To ensure that all cases are reported in a standard format, Cisco has established case priority definitions.

In Global Configuration Mode you configure parameters that affect the whole router device. It is suggested also to configure a password for the Telnet Lines VTY lines which will secure your access when connecting via Telnet over the network.

Some people prefer to create also local user accounts usernames and passwords on the router itself in order to authenticate to the device. To differentiate your Router from other devices in the network, you should configure a Hostname for your device. Router config hostname My-Router My-Router config.

This is an essential step in order for your router to be able to forward packets in the network. The most basic parameter for a Router Interface is the IP address. There are two main ways a router knows where to send packets. The administrator can assign static routes , or the router can learn routes by using a dynamic routing protocol. For simple network topologies, static routing is preferred over dynamic routing.

My-Router config ip route [destination network] [subnet mask] [gateway]. My-Router config ip route The command above tells the router that network Another popular static route that we usually configure on Internet Border routers is the default static route:.

My-Router config ip route 0. The default static route above instructs the router to send ALL packets that the router does not have a more specific route entry to gateway address This will overwrite the startup configuration. My-Router config exit My-Router copy running-config startup-config. This step is optional and is required only if your router acts as Internet border gateway to provide access to the internal private LAN towards the Internet.

Now we need to create an Access List which will identify which specific traffic will be translated using NAT. Assuming that the internal LAN network is My-Router config access-list 1 permit The overload keyword allows one public address to be shared among several private internal addresses.

First we need to create a pool of IP addresses that will be used to assign to clients:. Configure the DHCP pool to assign addresses to internal hosts ip dhcp pool lan-pool network Do not assign addresses 1 to 50 ip dhcp excluded-address For the first time when the device is not configured yet, you usually connect directly with a console cable via the CON port.

After typing a command, you press enter and the command is automatically active on the device. Now, there are two Router Configuration Modes or access modes :. The configuration shown above is just an example. It was taken from a router which had serial interface etc.

Your own configuration depends on the type of router you have, what interfaces are installed on the specific device etc. I am having problem with it when i plugged multiple devices e. One device will connect and reach the internet but others will connect and not browse.

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Basic Initial Cisco Switch Configuration

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