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HP A7500 IRF with DAC 10G cable.

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JavierBSD
Occasional Contributor

HP A7500 IRF with DAC 10G cable.

Hi,

 

Does anyone has used those cables instead of fiber?

 

Regards.

7 REPLIES
Fredrik Lönnman
Honored Contributor

Re: HP A7500 IRF with DAC 10G cable.

Not on the A7500, but on A5500. DAC is still just SFPs with a fiber between but not detacheable.

---
CCIE Service Provider
MASE Network Infrastructure [2011]
H3CSE
CCNP R&S

JavierBSD
Occasional Contributor

Re: HP A7500 IRF with DAC 10G cable.

Thanks Fredrik, however I forget to mention that the DAC that I have, is a copper one. And I'm worried about the performance as I read on some docs.

 

Greetings.

 

Javier.

Fredrik Lönnman
Honored Contributor

Re: HP A7500 IRF with DAC 10G cable.

What docs are that? Cant really see why there would be a performance hit using copper DAC. 10G is supported over copper without problem.

---
CCIE Service Provider
MASE Network Infrastructure [2011]
H3CSE
CCNP R&S

manuel.bitzi
Trusted Contributor
Solution

Re: HP A7500 IRF with DAC 10G cable.

Hey guys

 

See the Release Notes of 7500 R6701 Page 6:

 

"SFP+ Direct Attach Cables are not recommended for use as IRF connections because failover and recovery times are extended when this form of copper connection is use. Optical IRF connections are recommended to optimize IRF failure, recovery and convergence times."

 

For the the 5800 it's okay, for 7500 I use only fiber.

 

br

Manuel

H3CSE, MASE Network Infrastructure [2011], Switzerland
Fredrik Lönnman
Honored Contributor

Re: HP A7500 IRF with DAC 10G cable.

Alright, I can dig that. But I'm assuming we're still talking subsecond carrier delay, so I wouldnt be that against using DACs.

---
CCIE Service Provider
MASE Network Infrastructure [2011]
H3CSE
CCNP R&S

manuel.bitzi
Trusted Contributor

Re: HP A7500 IRF with DAC 10G cable.

Yes I agree. But will you really take that risk in a core network?

H3CSE, MASE Network Infrastructure [2011], Switzerland
JavierBSD
Occasional Contributor

Re: HP A7500 IRF with DAC 10G cable.

Thanks guys for your kindly answers, finally we decided to configure the IRF with 2 10G fibers.

 

Greetings.

 

Javier.