First Lane packet is dropped because of the CRC check failed. All the AAL5 connections are going to have the same problem of losing first packet. The Cisco and Cisco routers return the wrong power supply type when using with the ciscoEnvMonSupplySource snmp query. This condition is noticeable only on low end systems that support multiple banksizes for internal flash. Problem: The configured as a voice gateway will not register to it's gatekeeper after a reload.
This can be an intermittent problem, and may not occur on all 's. Symptom: If you do a debug ras on the gateway there are no ras messages being sent to the gatekeeper. Workaround: If you do a shut, no shut on the fastethernet interface, the gateway will register to the gatekeeper.
Problem is occurring when the customer is attempting to receive dial-tone on ISDN trunks. The method that the customer uses to obtain this dial-tone is to configure the ISDN trunks for overlap-receiving, and send in a setup message with no called party number. This causes the dial-tone from the router to not be heard. When a loopback DN is configured using wildcard ".
Workaround: do not put ". For example replace number On MGCP 0. When dialplan pattern is configured for the local IP Phones, the existing call-forward commands under ephone-dn are not entered under the E. This can cause a call not getting forwarded if you dial the entire E number. This problem happens only if you add or edit the existing dialplan pattern with call-forward commands already in place.
One way to avoid this problem is to configure the right dialplan pattern before configuring the call-forward commands. Additionally, if you modify the dialplan pattern commands, configure the call forward commands again under ephone-dn. This creates the call-forward commands under the E dial-peers created.
Music on hold works inconsistently in certain conditions. A calls B and conferences to C. B puts the conference on hold. B resumes the call and after a while puts the conference on hold again.
Now only A initiator hears the MOH. If the WAN link comes back up during the call and the call is between two IP phones or two analog phones, the call is not dropped.
However, if the call is between an IP phone and an analog phone, the call is dropped. The following sections describe the documentation available for the Cisco series. These documents consist of hardware and software installation guides, Cisco IOS configuration guides 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. These documents are available for the Cisco series 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. 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 hard-copy documents were printed.
The following sections provide sources for obtaining documentation from Cisco Systems. You can access the most current Cisco documentation on the World Wide Web at the following sites:. Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:. Cisco provides Cisco.
Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. Conditions No specific condition. Workaround No workaround for imaLinkIntervalTable. Reload the router. Then save the config. Conditions No specific conditions. The failure always happens when a SNMP get is done. Symptom MWI lights on does not glow. Workaround There are no workarounds. Workaround No apparent workaround, except that the problem is intermittent. Router has been reloaded.
Sometimes this does not seem to work. Further Problem Description : After the router has been reloaded we see an incomplete arp entry. Removing and adding VLAN data fixes this issue for a while. Symptom Consult transfer failed when XTO has call-forward busy. Symptom Cisco devices running an affected version of Internetwork Operating System IOS which supports Session Initiation Protocol SIP are affected by a vulnerability that may lead to a reload of the device when receiving a specific series of packets destined to port There are no known instances of intentional exploitation of this issue.
However, Cisco has observed data streams that appear to be unintentionally triggering the vulnerability. Workaround Workarounds exist to mitigate the effects of this problem on devices which do not require SIP. This occurs typically in the following inter-autonomous system scenario:. Workaround Use a configuration such as the following to remove extended communities from the CE router:.
Symptom On High CPU may be seen as well. Workaround No known workaround at this time. Conditions Client-initiated xconnect L2TPv2 sessions. Workaround The problem was not observed in Symptom Starting in calendar year , daylight savings summer-time rules may cause Cisco IOS to generate timestamps such as in syslog messages that are off by one hour.
Conditions The Cisco IOS configuration command: clock summer-time zone recurring uses United States standards for daylight savings time rules by default.
The Energy Policy Act of H. Workaround A workaround is possible by using the clock summer-time configuration command to manually configure the proper start date and end date for daylight savings time.
Conditions Happens when signal loopstart live-feed is configured under voice-port. Symptom INFO request messages is generated properly on hookflash. Conditions This feature is broken in Workaround Currently there is no workaround. Symptom Malformed SSH version 2 packets may cause a memory leak, causing the platform to operate under a degraded condition.
Under rare circumstances, the platform may reload to recover itself. Workaround As an interim solution until the affected platform can be upgraded to a Cisco IOS software image that contains the fix for caveat. Symptom Packet loss counter varies randomly. Conditions Sequence number goes wild. Symptom The minimum after-hours login timer is 5 mins. It is too long. Customer wants to be able to deactivate the login in 1 min. Conditions The problem is observed when after-hours call blocking is enabled.
Conditions This problem occurs in IOS version Workaround There is no known workaround at this time. Symptom SPEs may hang after voice calls have been processed. Workaround There is no workaround to prevent the SPEs from hanging. Conditions When a policy map is applied on the mohican point to point subinterface.
Symptom A router crashes when you enter the encapsulation dot1q vlan-id command. However, the symptom is platform-independent. Symptom One or more of the following symptoms may occur. Conditions This problem is triggered when making configuration changes to an access list that is currently in use by a service policy.
Workaround Disable the service policy before make changes to its components. Workaround There are two workarounds:. Conditions Crash happens immediately or after a few seconds of applying service policy on the gigabit ethernet and atm pvc.
The only commands executed after applying the service policy are write memory and show run. Symptom UTF8 localized characters can not display on new generation phones, ex , and etc. Conditions When using phone load later than 8. Symptom Router crashes after show policy-map command.
Workaround Remove the dialplan-pattern. Symptom The voice-class sip dtmf-relay force rtp-nte command does not work. As a result, rfc is not negotiated and hence DTMF is sent raw inband. With Symptom Spurious memory access and traceback is encountered while resetting the SIP phone After configuring presence with CME.
BLF speed dial entries, the status is not updated for the watched phones. Symptom CME does not send a 3xx message during call fwd if there was a call-transfer invoked before the call-forward happens. Therefore, when a transfer is done before a forward to voicemail happens, the CME does not send a 3xx. Conditions The call goes through fine, and the caller can leave a message for B, but DTMF fails even if signaling shows that payload was negotiated for the SIP trunk. So if the caller wants to re-record or mark the message urgent, it does not work, although the message gets recorded.
The module supports commercially available methods of key establishment, including Diffie-Hellman and IKE. All pre-shared keys are associated with the CO role that created the keys, and the CO role is protected by a password.
Therefore, the CO password is associated with all the pre-shared keys. The Crypto Officer needs to be authenticated to store keys. All Diffie-Hellman DH keys agreed upon for individual tunnels are directly associated with that specific tunnel only via the IKE protocol. All of the keys and CSPs of the module can be zeroized. Please refer to the Description column of Table 8 for information on methods to zeroize each key and CSP.
In order to prevent any secure data from being released, it is important to test the cryptographic components of a security module to insure all components are functioning correctly. The router includes an array of self-tests that are run during startup and periodically during operations. If any of these self-tests fail, the router will transition into an error state. Within the error state, all secure data transmission is halted and the router outputs status information indicating the failure.
Note Only the RSA signature calculation and verification algorithms are implemented in these cards and they do not perform RSA key generation. Follow the setting instructions provided below to place the modules in FIPS mode. Operating the routers without maintaining the following settings will remove the modules from the FIPS approved mode of operation. When removing the tamper evidence label, the Crypto Officer should remove the entire label from the router and clean the cover of any grease, dirt, or oil with an alcohol-based cleaning pad.
The Crypto Officer must re-apply tamper evidence labels on the router as described in the "Physical Security" section of this document.
Note Once Password Recovery is disabled, administrative access to the module without the password will not be possible. IOS version From the "configure terminal" command line, the Crypto Officer enters the following syntax:. The password must be at least 8 characters and is entered when the Crypto Officer first engages the "enable" command. The Crypto Officer enters the following syntax at the " " prompt:. Identification and authentication on the console port is required for Users.
The Crypto Officer must configure the module so that any remote connections via telnet are secured through IPSec. For more information about the Cisco , and modular access routers, refer to the following documents:. Cisco documentation and additional literature are available on Cisco. Cisco also provides several ways to obtain technical assistance and other technical resources.
These sections explain how to obtain technical information from Cisco Systems. You can submit comments by using the response card if present 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, Cisco Technical Support provides hour-a-day, award-winning technical assistance. If you do not hold a valid Cisco service contract, contact your reseller. The Cisco Technical Support Website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, days a year at this URL:.
If you have a valid service contract but do not have a user ID or password, you can register at this URL:. S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.
If your issue is not resolved using the recommended resources, your service request will be assigned to a Cisco TAC engineer. S1 or S2 service requests are those in which your production network is down or severely degraded. Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.
To ensure that all service requests are reported in a standard format, Cisco has established severity definitions. Severity 1 S1 —Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation. Severity 2 S2 —Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products.
You and Cisco will commit full-time resources during normal business hours to resolve the situation. Severity 3 S3 —Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Severity 4 S4 —You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations. Information about Cisco products, technologies, and network solutions is available from various online and printed sources. Both new and experienced users will benefit from these publications.
Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources.
You can access Packet magazine at this URL:. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions.
You can view current offerings at this URL:. The Cisco , and Routers Branch office networking requirements are dramatically evolving, driven by web and e-commerce applications to enhance productivity and merging the voice and data infrastructure to reduce costs.
The zeroization is the same as above. Zeroized when IPSec session is terminated. Zeroized when the SSL connection is terminated. Contacts Feedback Help Site Map. The interface is transmitting or receiving packets. In order to provide complete and accurate simulations, GNS3 actually uses the following emulators to run the very same operating systems as in real networks:.
To perform router installation, we need to have an IOS image. Note: Cisco has three distinct models and different chassis for all the models, If you want to make this router function as an L3 device i.
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