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Cisco IOS Software Releases 12.2 Mainline

Field Notice: *Expired* FN - 15911 - MPLS VPN with TE and MPLS InterAS Advisory on Cisco IOS Software


Revised November 28, 2007

October 18, 2001

NOTICE:

THIS FIELD NOTICE HAS BEEN EXPIRED AND IS NO LONGER MAINTAINED OR UPDATED BY CISCO.

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE, WARRANTY OR SUPPORT. USE OF THE INFORMATION ON THIS FIELD NOTICE OR MATERIALS LINKED FROM THIS FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

Product

Comments

Cisco IOS? 12.2

See Section Cisco IOS Version Affected below.

Cisco IOS 12.2T

See Section Cisco IOS Version Affected below.

3600

Cisco 3660 Series and 3640 Series

4500

Cisco 4500 Series

7000

Cisco 7200 Series and 7500 Series

UBR 7000

Cisco UBR 7000 Series

RPM

Cisco RPM Series

Problem Description

MPLS VPN functionality for all supported platforms is compromised when a TE tunnel is configured between PEs with or without LDP. This issue is tracked with the following Defect tracking numbers:

DDTS ID:

CSCdv29315

CSCdv34997

MPLS VPN InterAS functionality for all supported platforms is compromised. This issue is tracked with the following Defect tracking numbers:

DDTS ID:

CSCdv32499

CSCdv57629

Background

The issues mentioned in this Notice were introduced in the interim build of Cisco IOS 12.2(3.4) and 12.2(3.4)T. See section Cisco IOS Version Affected below.

Problem Symptoms

The following outlines the symptoms per DDTS ID.

CSCdv29315 and CSCdv34997

The two MPLS VPN issues causes the traffic to NOT be routed across the TE tunnel at the PE routers. For a network diagram of the types of TE tunnels please refer to the diagram below:

fn15911_glgbds.gif

CSCdv32499 and CSCdv57629

End to End connectivity is broken in MPLS VPN InterAS configurations on the ASBR. The MPLS forwarding table on an ASBR does not have the MPLS forwarding entry for its EBGP neighbor ASBR.

{vpn1}CE1----PE1----ASBR1----ASBR2-----PE2---CE2{vpn1}

Workaround/Solution

CSCdv29315 and CSCdv34997

Workaround:

There is no workaround other than not using TE tunnels between the PE routers.

Solution:

Cisco IOS release 12.2(6) and Cisco IOS release 12.2(4)T1 as well as Cisco interim build 12.2(5.8)T and above.

CSCdv32499 and CSCdv57629

Workaround:

There is no workaround

Solution:

Cisco IOS release 12.2(6) and Cisco IOS release 12.2(4)T1 as well as Cisco interim build 12.2(5.8)T and above.

Solution for MPLS Issues

Cisco IOS Major Release

Cisco IOS Interim Build

Cisco IOS Maintenance Release

Cisco IOS Images

CCO Availability

12.2

12.2(5.8)

12.2(6)

all rsp

all 7200

all RPM

all 4500

all 3600

Forecast: November 15, 2001

12.2T

12.2(5.8)T

12.2(4)T1 & 12.2(7)T

all rsp

all 7200

all RPM

all 4500

all 3600

Forecast: November 1 & See updates

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCdv29315 (registered customers only)

MPLS VPN over TE does not work

CSCdv34997 (registered customers only)

CE becomes unreachable when TE tunnel is installed between PEs

CSCdv32499 (registered customers only)

MPLS-VPN: Inter-AS: Labels not present in TFIB for EBGP peer ASBRs

CSCdv57629 (registered customers only)

TFIB entry is not created for EBGP Nbr route in InterAS VPN

Cisco IOS Versions Affected

Cisco IOS Major Release Affected

Cisco IOS Maintenances Affected

Cisco IOS Images Affected

12.2

12.2(3.4) through 12.2(5.7)

all rsp images,

all 7200 images,

all RPM images,

all 4500 images,

all 3600 images

12.2T

12.2(3.4)T through 12.2(5.7)T

all rsp images,

all 7200 images,

all RPM images,

all 4500 images,

all 3600 images

Upgrade Program

Please see How to Choose a Cisco IOS Software Release.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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