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New Member

IS-IS routing on 2851

Hello! Does somebody can tell me if the 2851 supports 12 IS-IS multi-task?

Thanks in advance.

5 REPLIES
Cisco Employee

Re: IS-IS routing on 2851

Milady,

Do you mean 12 isis instances? Could you please clarify your question.

Regards,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: IS-IS routing on 2851

Yes, excuse me. 12 multiareas.

Cisco Employee

Re: IS-IS routing on 2851

Milady,

The limit for the number of different areas you can have is 29.

Please refer to the following document for more information:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t5/ismarea.htm

Regards,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: IS-IS routing on 2851

Thanks, Yes I just found another link too, where says the 2851 has a base of 8.

http://www.cisco.com/en/US/docs/ios/solutions_docs/telco_dcn/tlcsonet.html#wp1303453

I thank you for your time!

Cisco Employee

Re: IS-IS routing on 2851

Milady,

This is not a hard limitation but rather a general recommendation for the given platforms. The only hard limitation 29 processes derived from the number of process data blocks (PDBs) available on the box.

12 areas should be no issues depending on how many routes you have in each area of course:

Enter configuration commands, one per line. End with CNTL/Z.

2851(config)#router isis un

2851(config-router)#net 49.0001.0001.0001.0001.00

2851(config-router)#router isis deux

2851(config-router)#net 49.0002.0001.0001.0001.00

2851(config-router)#router isis trois

2851(config-router)#net 49.0003.0001.0001.0001.00

2851(config-router)#router isis quatre

2851(config-router)#net 49.0004.0001.0001.0001.00

2851(config-router)#router isis cinq

2851(config-router)#net 49.0005.0001.0001.0001.00

2851(config-router)#router isis six

2851(config-router)#net 49.0006.0001.0001.0001.00

2851(config-router)#router isis sept

2851(config-router)#net 49.0007.0001.0001.0001.00

2851(config-router)#router isis huit

2851(config-router)#net 49.0008.0001.0001.0001.00

2851(config-router)#router isis neuf

2851(config-router)#net 49.0009.0001.0001.0001.00

2851(config-router)#router isis dix

2851(config-router)#net 49.0010.0001.0001.0001.00

2851(config-router)#router isis onze

2851(config-router)#net 49.0011.0001.0001.0001.00

2851(config-router)#router isis douze

2851(config-router)#net 49.0012.0001.0001.0001.00

2851(config-router)#

Regards,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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