4 Byte AS number with RD and BGP

[ssengotaiyan]

I am not able to apply 4 byte AS as below on 7200 image . Any help here please

Image :c7200-advipservicesk9-mz.122-33.SRE14.bin

NPE-GE

Error as below:

Router(config)#router bgp 135296
Router(config-router)#bgp asnotation dot
Router(config-router)#exit
Router(config)#
Router(config)#ip vrf test1
Router(config-vrf)#rd 2.4224:100
                          ^
% Invalid input detected at '^' marker.

 
Router(config-vrf)#do sh ver
Cisco IOS Software, 7200 Software (C7200-ADVIPSERVICESK9-M), Version 12.2(33)SRE14, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Thu 03-Mar-16 23:31 by prod_rel_team

AS per cisco documents i should able to assign RD with 4byte AS:NN

ip vrf vpn_red
 rd 1.0:100
 route-target both 1.1:100
 exit

[Philip D'Ath]

I'm guessing your software is too old.  Are you able to upgrade to a 15.x release?

You could look at using the magic BGP ASN 23456, which is used for transitioning systems from 2 to 4 byte ASNs.  Check out this document and search for 23456.  I'm not sure how much it will help in this particular case though.  Its a bit tricky.

http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/border-gateway-protocol-bgp/data_sheet_C78-521821.html

[ssengotaiyan]

Hi Phil

  No it is not IOS issues. i have now upgraded to 15.x but still see same issues.

see my logs below. any other ideas..

Router(config)#
Router(config)#router bgp 135296
Router(config-router)#b
*Apr 15 11:12:14.539: %BGP-4-NORTRID: BGP could not pick a router-id. Please configure manually.gp
Router(config-router)#bgp as
Router(config-router)#bgp asnotation do
Router(config-router)#bgp asnotation dot
Router(config-router)#exit
Router(config)#
Router(config)#
Router(config)#
Router(config)#
Router(config)#
Router(config)#vrf defi
Router(config)#vrf definition test123
Router(config-vrf)#rd 2.4224:100
                          ^
% Invalid input detected at '^' marker.

Router(config-vrf)#rd 2.4:100
                         ^
% Invalid input detected at '^' marker.

Router(config-vrf)#sh ver
Router(config-vrf)#sh ver
                   ^
% Invalid input detected at '^' marker.

Router(config-vrf)#do sh ver
Cisco IOS Software, 7200 Software (C7200-ADVIPSERVICESK9-M), Version 15.2(4)M10, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2016 by Cisco Systems, Inc.
Compiled Mon 07-Mar-16 06:52 by prod_rel_team

ROM: ROMMON Emulation Microcode
BOOTLDR: 7200 Software (C7200-ADVIPSERVICESK9-M), Version 15.2(4)M10, RELEASE SOFTWARE (fc1)

Router uptime is 2 minutes
System returned to ROM by unknown reload cause - suspect boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19
System image file is "tftp://255.255.255.255/unknown"
Last reload reason: unknown reload cause - suspect boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19



This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.

[Philip D'Ath]

I just had a read of this further, and it says after configuring "bgp asnotation dot" you must perform a hard reset of the BGP process before further configuration.  Perhaps try a "clear ip bgp *" then see if you can configure the rd.

[Philip D'Ath]

Just read something interesting.  It looks like it only affects the output of "show" commands, as opposed to the input.

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/irg-4byte-asn.html

Step 5

bgp asnotation dot Example: Device(config-router)# bgp asnotation dot

Changes the default output format of BGP 4-byte AS numbers from asplain (decimal values) to dot notation. Note    4-byte AS numbers can be configured using either asplain format or asdot format. This command affects only the output displayed forshow commands or the matching of regular expressions.

[ssengotaiyan]

From asplain is default which shows as normal formate.

after enter the as-notation AS is converted into Dot form.

i am looking to design mpls and bgl with 4 byte AS number.

what i have read so far is community string with 4 byte is not possible??

looking some deisgn documents for better understanding.

[ssengotaiyan]

i did this before,

here is the log for you reference , i did again.

Router#clear ip bg
Router#clear ip bgp *
Router#
Router#
Router#
Router#
Router#
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#vrf de
Router(config)#vrf definition test123
Router(config-vrf)#rd 2.4224:100
^
% Invalid input detected at '^' marker.

[Philip D'Ath]

And if you enter it in asplain notation, and then do a "show running" is it displaying it in dotted notation?

[ssengotaiyan]

no it will be back to plaintext format..

[Nagendra Kumar Nainar]

Hi,

I think it is a DOC bug. Can you try some 15.4 release?. I think it might not be available for 7200. So try in a different router with 15.4.

I remember using 4byte ASN based RD but dont think I have seen it in 15.2 or 15.3.

-Nagendra

[ssengotaiyan]

Tried with 15.4 in 7200 same story. 

We need to make it on 7200 as it act as edge for the mpls core.

Also assigning the community using as:value is not possible with 4byte AS.

[lorenzo limardo]

Hi,

can i ask you kindly where i can find a copy of c7200-adventerprisek9-mz.122-33.SRE14.bin ?

I have same problem, but i cannot find, nor is possible now to subscrivbe for a new contract.

Any help would be appreciated.

Thanks in advance.

Lo