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Table Of Contents
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.0(19)SLUpgrading to a New Software Release
Upgrading Cisco IOS Software from Earlier Cisco IOS Releases
New Features in Cisco IOS Release 12.0(19)SL
Cisco 10000 Series ESR Software Features
Automatic Protection Switching Support
Controlling the Rate of Logging Messages
Testing Performance of High-Speed Interfaces
Caveats in Cisco IOS Release 12.0(19)SL
Resolved Problems in Cisco IOS Release 12.0(19)SL
Resolved Problems in Cisco IOS Release 12.0(17)SL2
Resolved Problems in Cisco IOS Release 12.0(17)SL1
Resolved Problems in Cisco IOS Release 12.0(17)SL
Obtaining Technical Assistance
Contacting TAC by Using the Cisco TAC Website
Release Notes for the Cisco 10000 Series ESR
for Cisco IOS Release 12.0(19)SL
October 8, 2001
These release notes provide information about Cisco IOS Release 12.0(19)SL running on the Cisco 10000 series edge services router (ESR). These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode and related documents.
Cisco IOS Release 12.0(19)SL is based on these previous releases:
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Cisco IOS Release 12.0(17)SL2
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For a list of the software caveats that apply to Cisco IOS Release 12.0(19)SL, see the "Caveats in Cisco IOS Release 12.0(19)SL" section and the Release Notes for Cisco IOS Release 12.0(S).
To review the release notes for Cisco IOS Release 12.0S, go to www.cisco.com and click Technical Documents > Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Release Notes > Cisco 12000 Series Router > Cisco 7000 Family and 12000 Series - Release Notes for Release 12.0(S).
Use these release notes in conjunction with the cross-platform Release Notes for Cisco IOS Release 12.0.
Contents
This document contains the following sections:
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Upgrading to a New Software Release
For specific information about upgrading your Cisco 10000 series ESR to a new software release, see the Cisco 10000 Series ESR Software Configuration Guide.
For general information about upgrading to a new software release, see the product bulletin Cisco IOS Upgrade Ordering Instructions located at:
http://www.cisco.com/warp/public/cc/pd/iosw/prodlit/957_pp.htm
For additional information about ordering Cisco IOS software, refer to the Cisco IOS Software Releases URL:
http://www.cisco.com/warp/public/cc/pd/iosw/iore/index.shtml
Upgrading Cisco IOS Software from Earlier Cisco IOS Releases
Caution
Before you upgrade to Cisco IOS Release 12.0(19)SL, save your current configuration file. If you decide to reinstall Release 12.0(14)SL, or an earlier release, you must also reinstall the configuration file associated with that release. This is because some BGP configuration-file entries in Release 12.0(19)SL are not compatible with Release 12.0(14)SL or earlier releases.
System Requirements
We recommend that you use 512 MB of memory on the Performance Routing Engine (PRE). New PREs are shipped with 512 MB of memory. In a redundant setup, both PREs should have the same amount of memory.
New Features in Cisco IOS Release 12.0(19)SL
The following new features and improvements are supported in Cisco IOS Release 12.0(19)SL:
NetFlow Accounting—Supports gathering and exporting Version 5 and Version 8 record types to NetFlow FlowCollectors, and provides basic metering for a key set of applications, including network traffic accounting, usage-based network billing, network planning, and network monitoring capabilities.
GRE Tunneling—Supports GRE IP and DVMRP multicast tunnel modes to transport otherwise unroutable packets across the IP network and provide data separation for VPN services. GRE tunnels make it possible to have multiprotocol local networks running over a single-protocol backbone. They also provide workarounds for networks containing protocols that have limited hop counts, connectivity for discontinuous subnetworks, and allow VPNs to connect across wide-area networks. DVMRP multicast tunnel modes are only supported between the Cisco 10000 series ESR and a Sun SPARCstation running DVMRP version 3.8 or higher.
Policy-Based Routing (PBR)—Provides a tool for expressing and implementing the forwarding or routing of data packets, based on the policies defined by network administrators. PBR is a way to have policy override on routing protocol decisions by selectively applying policies based on access list and/or packet size. Network administrators can also use PBR to selectively change the IP ToS, IP precedence, and IP QoS Group fields for matching incoming packets on an interface.
The Cisco 10000 series ESR supports a maximum of 255 PBR policies, and 32 route maps within each policy. The following subset of Policy-Based routing commands are supported in this release of IOS software:
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Turbo QoS—Provides more efficient handling of QoS policy maps for quicker packet classification and a QoS solution that scales.
Subinterface Policy Maps—Allows you to use the service-policy command to configure QoS features at the subinterface level in addition to configuring it on main interfaces. The types of subinterfaces supported include Frame Relay, ATM (both UBR and VBR), and 802.1Q VLAN. ATM VBR subinterfaces support all QoS features including queueing. On all other subinterface types, any queueing-related commands in the service-policy, such as bandwidth, priority, shape, queue-limit and random-detect, are ignored.
Diffserv WRED—Extends the functionality of WRED to enable support for Differentiated Services (DiffServ) and Assured Forwarding (AF) Per Hop Behavior (PHB). DiffServ WRED enables customers to implement AF PHB by coloring packets according to DSCP values and then assigning preferential drop probabilities to those packets.
PQ/CBWFQ on ATM PVCs—Allows a service policy, including class queue policy statements, to be attached to ATM VBR VCs. This feature is enabled using the Modular Quality of Service Command-Line Interface (MQC) syntax.
Cisco 10000 Series ESR Software Features
Table 1 lists the features supported in the Cisco 10000 series ESR.
Limitations and Restrictions
This section describes any limitations and restrictions that you should review before you use the Cisco 10000 series ESR.
Automatic Protection Switching Support
Automatic protection switching (APS) is supported on the OC-12 Packet Over SONET (POS) and Channelized OC-12 (ChOC-12) line cards with this release. However, certain limitations apply if the PRE installed in your system is the ESR-PRE. These limitations do not apply to the ESR-PRE1. You can verify which PRE is installed in the ESR by using the show version command.
For APS to work properly with the ESR-PRE, you must ensure that the OC-12 POS or ChOC-12 line card is installed in the lower-numbered (odd) slot.
The system receives clocking information from the line card in the odd slot. If you remove the odd-numbered card (or if the clocking mechanism on that card fails), the clocking is lost and the data path is shut down (Caveat CSCdr81416).
As a workaround, we recommend the following:
1.
2.
Router(config)# redundancyRouter(config-r)# no associate 3 4Router(config-r-a-sl)# exitRouter(config)# interface pos 3/0/0Router(config-if)# shutdownYou can now remove the card in slot 3.
3.
Controlling the Rate of Logging Messages
It is important that you limit the rate that system messages are logged by the Cisco 10000 series ESR. This avoids a situation where the router becomes unstable and the CPU is overloaded. Use the logging rate-limit command to control the output of messages from the system.
We recommend that you configure the logging rate-limit command as follows:
Router(config)# logging rate-limit console all 10 except criticalThis command rate-limits all messages to the console to 10 per second, except for messages with critical priority (level 3) or greater.
For more information on the logging rate-limit command, see the Cisco IOS Configuration Fundamentals Command Reference.
Testing Performance of High-Speed Interfaces
Since Cisco IOS Release 12.0(17)SL, the software has been enhanced with multiple queues for all classes of traffic over high-speed interfaces. The software selects a queue based on the source and destination address for the packet. This ensures that a traffic flow always uses the same queue and the packets are transmitted in order.
When the Cisco 10000 series ESR is installed in a real network, the high-speed interfaces work efficiently to spread traffic flows equally over the queues. However, using single traffic streams in a laboratory environment may result in less-than-expected performance.
Therefore, to ensure accurate test results, you should test the throughput of the gigabit Ethernet, POS, or ATM uplink with multiple source or destination addresses.
Tip
Important Notes
This section contains important issues that you should be aware of with Cisco IOS Release 12.0(19)SL and previous releases.
Frame Relay and PPP Sessions
You can run up to 4200 Frame Relay sessions or 1300 PPP sessions, and you can configure up to 800 BGP peers on the Cisco 10000 series ESR. The router also supports up to 512 Multilink Point-to-Point (MLP) protocol sessions.
Note
Cisco Discovery Protocol
Starting with Cisco IOS Release 12.0(15)SL, the Cisco Discovery Protocol (CDP) is disabled by default. You can enable CDP on an interface using the cdp enable command.
Caveats in Cisco IOS Release 12.0(19)SL
Table 2 describes the caveats for the Cisco 10000 series ESR running Cisco IOS Release 12.0(19)SL.
Resolved Problems in Cisco IOS Release 12.0(19)SL
This section lists problems that were found and resolved in Cisco IOS Release 12.0(19)SL.
CSCdr98341
The Flash disk can fall into the chassis when you insert the disk into the empty space to the right of slot B in the PRE flash assembly.
CSCds48362
The show interface output occasionally displays an extremely large number of configured VCs which do not exist.
CSCds50249
If incoming multicast packets match an input access list that has the log option enabled, the output of the show log command and show access-list commands display double the number of matches.
CSCds69465
Ping traffic does not resume after switching from an explicit path to a dynamic path.
CSCdt00312
The flash file delete function may choose the wrong default device when you request deletion of a file from flash storage. The incorrect default used is slot0:.
CSCdt21254
When the ACL is downloaded from the tftp server, the CPU advances to 100% utilization and several line cards lost IPC with the PRE and are reset.
CSCdt28444
In a chassis using TACACS security and running redundant PREs, you can access the console while the secondary PRE is cutting over to primary PRE. If no action is taken on the console for the length of the session timeout period, TACACS engages on the console. If the user does access the console during the cutover, the user enters exec mode (not enable mode).
CSCdt47342
TFIB table failure.
CSCdt76746
In some cases, ATM counters display incorrect packet input values after receiving packets from several locations (for example, the line card, IOS, and the PXF forwarding engine).
CSCdu28935
When the interface on the remote end is set to be administratively down, and you are attempting to bring up the PPP protocol, the status of the interface alternate between down and up until the PPP protocol is up.
CSCdu61078
Cannot ping Cisco 10000 over PPLB group.
Resolved Problems in Cisco IOS Release 12.0(17)SL2
This section lists problems that were found and resolved in Cisco IOS Release 12.0(17)SL2.
CSCdr19206
PRE performance is no longer affected when preconfiguring a line card using the card command.
CSCdt93862
The access level issue that occurred when using the Web interface has been corrected.
CSCdt96234
Router no longer crashes after wr mem command.
CSCdu31306
There is no longer a PFX stall error with 126 Multi-Link PPPs in a QoS configuration.
CSCdu58727
Priority queues no longer experience tail drops when line card is under heavy load.
CSCdu65451
Duplicate caveat which was resolved (see CSCdu73749).
CSCdu87866
When you unconfigure and configure the router using the copy tftp run command, this no longer causes the router to hang.
CSCdv04992
A large increase in latency for Multi-Link PPP bundles combined with an increase in the number of packet tail drops no longer causes a dramatic decrease in performance.
CSCdv05972
Duplicate caveat which was resolved (see CSCdv12192).
CSCdv07513
The PXF stall error no longer occurs in column 6 during low traffic.
CSCdv08702
There is no longer a slow buffer leak when running multicast input on MLP.
CSCdv12192
There is no longer a buffer leak in Multi-Link PPP column 7.
Resolved Problems in Cisco IOS Release 12.0(17)SL1
This section lists problems that are resolved in Cisco IOS Release 12.0(17)SL1.
CSCdt11794
If you enter the dir disk0/1 command at the rommon prompt, a TLB (Store) Exception error message no longer appears.
CSCdu71387
If the router receives an IP packet with Ethernet padding over the MLP bundle, it now properly passes the packet to the line card.
CSCdu73749
When the router was configured with large numbers of routes, clearing the entire routing table caused high CPU use. In rare cases, the line cards or Cisco IOS software reboot. This problem no longer occurs.
Resolved Problems in Cisco IOS Release 12.0(17)SL
This section lists problems that are resolved in Cisco IOS Release 12.0(17)SL. For a list of problems that were resolved in previous Cisco IOS Releases, refer to the release notes for those particular versions.
CSCdr32279
When you enter the hw-module slot_number reset command, the event sequence appears in a different order than that shown by the reload command if the logging console is configured to informational.
CSCdr52081 and CSCdj94209
The PRE may crash if you repeatedly change a port back and forth from channelized to unchannelized.
Repeated conversions of a T3 port from channelized mode to unchannelized mode and back, with intervening assignments of IP addresses to the interfaces and ping testing, may cause the PRE crash.
CSCdr92058
Large multicast groups may cause CPU hog issues with PIM.
CSCds04367
When older CT3 line cards are powered on with live DS3 signals present at the receive BNC connector, the receive line interface device on the board may lock up, preventing the controller from running.
CSCds18665
If the interface between a PE (PE1) and CE router goes down, MPLS labels disappear at the far end provider edge peer (PE2) MPLS interface.
CSCds36117
If you enter the clear ip mroute command on a system with large multicast groups, CPU hog issues may arise that cause problems of moderate severity (such as losing keepalives).
CSCds51102
If you perform an SNMP walk or view entries in the if table, cef-layer internal interfaces appear in the interface table.
CSCds55667
Kentrox DS3 subrate mode does not work when you set it to full bandwidth (45.2 Mbps on Kentrox CSU, 44210 kbps on a Cisco 10000 Series ESR).
CSCds86293
If you issue the dir or show slot0: or show slot1: command, the router reports Open device slot0 failed (Device not ready).
CSCds89640
If large OIDs (1024.1 fields) are sent to the router, the Cisco 10000 stops responding.
CSCds91966
If you delete a T1/E1, IP routes associated with subinterfaces are not removed.
CSCdt11390
On a Cisco 10000 system with channelized OC-12 line cards, the output of the show controllers command is incomplete and incorrect.
CSCdt31691
When a large number of VBR-nrt VCs are configured (200 and above) and the link transitions DOWN the host software running on the OC-12 ATM line card may take a SW Watchdog timeout, forcing the line card firmware to reload.
CSCdt34428
If you perform OIR on a line card configured for 768 PPP sessions with traffic running on all interfaces, some interfaces fail to come up. The show interface command displays the IPCP state as "Listen".
CSCdt42890
On rare occasions, line cards may not be recognized when you perform an OIR of multiple cards on a new system, or in a system in which the configuration was erased (for example, using write erase).
CSCdt63446
If an access-list with logging option enabled is attached to an interface, and you send traffic through the interface, this brings down all of the interfaces.
CSCdt67315
Under circumstances where ATM VCs are created and deleted on a regular basis, the OC-12 ATM segmenter firmware can transition to a state in which it drops some packets without counting them in a data stream where packet sizes alternate from small to large. This manifests itself in lower throughput.
CSCdt74932
When a TU-AIS is received at a particular TU in TUG3#3, the next TU at the T1 or E1 level contains data corruption as well.
CSCdt76739
If you remove an APS configuration for a ChOC-12 line card, followed by the show controllers sonet <high slot number, for example 2/0/0> or the show controllers sonet command, the Cisco 10000 crashes.
Other Resolved Caveats
This section includes caveats listed in previous release notes that are regarded as resolved because they are unreproducible or do not affect the behavior of the Cisco 10000 ESR. In the event a caveat listed in this section causes problems, please contact Cisco customer service.
For a list of unreproducible caveats in previous Cisco IOS Releases, refer to the release notes for those particular releases.
CSCdp96265
If you configure a DS3 BERT pattern 2^20-O153 on any unchannelized DS3 (by using the bert pattern 2^20-O153 interval 1-14400 command), and you then connect the line card to T-Bird 310 test set, the pattern does not synchronize with T-Bird 310.
CSCdr25441
The router sends out DHCP INFORM and DISCOVER messages containing an incorrect Ethernet address.
CSCdr36564
When you use the Frame Relay autosense feature, the Cisco 10000 Series ESR sends all three LMI status message types immediately after the interface starts responding. However, sometimes the switch at the other end is not ready to receive messages and as a result, misses one or two messages that were sent. LMI autosense waits until the next scheduled interval (default is 1 minute) to send the messages again.
This problem primarily affects clear channel CT3 interfaces.
CSCdr47500
During periods of heavy traffic (approaching interface line rate), some interfaces may experience inconsistent performance between interfaces of the same type.
CSCdr62013
If large MLP configurations are in use, and you attempt to copy the configuration from a TFTP server directly into the running config, the copy may fail. Failures may include interfaces not appearing, or IPCP or LCP states not opening correctly.
CSCdr72007
The number of VPNs that can be created on gigabit Ethernet subinterfaces is limited to under 100.
CSCdr82579
When a ChOC-12 line card is reconfigured from a channelized T3 configuration to an unchannelized T3 configuration or vice-versa, the initial packets are not forwarded.
CSCdr82363
When the encapsulation mode is changed from PPP to HDLC or vice-versa, the system drops about 3 of the next 10 packets transmitted. After that, the packets are transmitted normally.
CSCds01233
If you send a large number of small packets in large multicast groups, this may cause the following certain debug messages to appear on the console.
CSCds25069
The default logging parameter (logging rate-limit console all 10 except critical) sets console logging to disabled.
CSCds36324
Mass configuration (which occurs during boot/reload and can occur during link state changes) takes a long period of time (for example, more than 40 minutes for 2000 VCs associated with a main interface) with large numbers of PVCs (100s to 1000s). This problem occurs when you attempt to configure large numbers of PVCs on the main interface (or multipoint subinterfaces) with static maps on each PVC.
CSCds41791
If you reload a Cisco 10000, some initialization messages are logged to the console before the startup-config is loaded. These initialization messages are transitional and may report an incorrect state, especially for the FastEthernet interface.
CSCds43837
The show atm pvc command displays "Unexpected QoS type" for its traffic parameters. This occurs when a PVC was previously configured with only an ATM vc-class, and then the vc-class was subsequently deleted.
CSCds49222
When a segment on an MPLS traffic engineered path is disabled, the PXF engine reloads, temporarily causing all forwarding to stop.
CSCds49957
Note
When you boot the Cisco 10000, the system may display the following messages:
*Oct 17 12:32:48.287: %SNMP-3-TRAPBLOCK: Attempt to generate SNMP trap from a process with blocking disabled-Traceback= 60565064 606A6B34 60678238 60678438 6067AD88 6067AF30 602FCBDC 6024817C 60248168CSCds64134
Occasionally, after you reload routers (with background traffic load equal to no_drop rate), the throughput is some 3 to 400 pps below the expected rate.
CSCds65431
On rare occasions, after a single reload while under load, the Gigabit Ethernet line card is up but drops nearly all packets on the output queue.
CSCds67459
When a serial interface is configured to be part of an MPLS/VPN, if you enter the no channelized command on the T3 controller, this clears the interface. However, the sh ip vrf vrf_name continues to show the interface as part of the vrf.
CSCds74846
When MPLS TE is configured and the logging console is turned on, the following error message appears repeatedly:
"00:58:10: %TFIB-7-SCANSABORTED: TFIB scan not completing. MAC string updated."CSCds86646
ISIS adjacencies recalculated with 65-85MB of tcp traffic to rtr.
CSCds86767
A Cisco 10000 router running Release 12.0(10)SL may experience a buffer leak when interfaces are down but not administratively down.
CSCdt12602
If in a Frame-Relay environment a handful of interfaces are flapping continuously, the interface statistics report input errors (overruns) on the flapping interfaces.
CSCdt19582
Following a reload of the Cisco IOS software, the Gigabit Ethernet interface does not always come back up. The interface remains in the "GigabitEthernet1/0/0 is down, line protocol is down" state.
CSCdt25901
During a reload, if the router continuously receives IP packets, CPUHOG messages may appear in the log, and the router may take longer to come up.
CSCdt28191
After you reload line cards under background traffic load, one or more interfaces may not come up.
CSCdt33623
If you issue a write erase command on the primary PRE followed by an erase sec-nvram: command, and then reload both PREs simultaneously, some line cards may not be recognized correctly on reboot.
CSCdt40511
The Cisco 10000 crashed after several hours of testing with 500 CT3 ds0 interfaces configured for Frame Relay that were receiving multicast traffic at a rate of 10 pps of 260-byte packets.
CSCdt41680
ip address negotiate sends dhcp requests out all serial line interfaces.
CSCdt50591
In some test instances, Frame Relay interfaces did not correctly join a multicast group when it should have. The result is that multicast packets destined for those interfaces will be punted to the route processor. Enough packets cause the CPU usages on the route processor to run at a high usage.
CSCdt53363
On rare occasions, when a large number of ds0 interfaces is configured on a CT3 line card, buffer with corrupt pool pointer error messages may appear.
CSCdt54684
On rare occasions, if a large number of ds0 interfaces are configured on a CT3 line card, spurious memory error messages may appear.
CSCdt55873
On rare occasions in which relatively high rates of bursty traffic are received on the OC-12 ATM line card, some packets may be dropped but not counted by the software.
CSCdt63838
Bad file magic number - cannot load bootflash.
CSCdt63854
Under rare conditions when scripts of VC creates and VC deletes are executed in turn, some VBR-nrt VCs are not created.
CSCdt64787
At the end of the line in the show run command output, 0.0.0.0 is appended randomly.
CSCdt70049
With 500 Frame Relay interfaces on CT3 running IP Multicast, multicast packets get punted to the RP causing IPC OIR on the CT3. This causes the line protocol on the router connected to the Cisco 10000 to go down (and remain down) on some interfaces. The interface stats show no traffic over the affected interface. On the Cisco 10000 the Frame Relay PVC corresponding to it shows as Deleted.
CSCdu22374
When the Cisco 10000 series ESR is configured for 802.1q VLANs, the output of the show vlans command reports values for gigabit Ethernet received packets, gigabit Ethernet received bytes, and VLAN received packets to be higher than they should be.
CSCdu22652
If you perform a reload, the values for the transmitted and received output of the show vlans command indicates, incorrectly, that those values incremented.
CSCdu25589
When the destination IP address of an incoming 802.1q packet matches one of the IP addresses of the router, the output of the show vlans command for 802.1q packets increments two times. Ping request packets, however, are always counted correctly regardless of destination.
Obtaining Documentation
The following sections provide sources for obtaining documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at the following sites:
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Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Cisco documentation is available in the following ways:
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http://www.cisco.com/cgi-bin/order/order_root.pl
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http://www.cisco.com/go/subscription
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Documentation Feedback
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.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:
Attn. Document Resource Connection
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.
Cisco.com
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.
To access Cisco.com, go to the following website:
http://www.cisco.com
Technical Assistance Center
The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.
Contacting TAC by Using the Cisco TAC Website
If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:
http://www.cisco.com/tac
P3 and P4 level problems are defined as follows:
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In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.
To register for Cisco.com, go to the following website:
http://www.cisco.com/register/
If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:
http://www.cisco.com/tac/caseopen
Contacting TAC by Telephone
If you have a priority level 1 (P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
P1 and P2 level problems are defined as follows:
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