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Tony Li
Tony Li
12/5/2012 | 1:55:39 AM
re: Cisco Sprints Ahead With HFR

I think that you're ignoring the HOLB that happens to traffic that is entering the switch.

Tony
Tony Li
Tony Li
12/5/2012 | 1:55:31 AM
re: Cisco Sprints Ahead With HFR

echo2,

If you have a MTBF that is high enough, then even if the MTTR is high, you can still document five 9's reliability. So the actual requirements are other than what is stated. Which is not news. ;-)

Tony
pig3head
pig3head
12/5/2012 | 1:55:14 AM
re: Cisco Sprints Ahead With HFR
is there anyone who has seen a 40G line card?

Procket,Juniper and Avici said they all have 40G line card. is it a trick?



pig3head.

echo2
echo2
12/5/2012 | 1:55:09 AM
re: Cisco Sprints Ahead With HFR
echo2,

If you have a MTBF that is high enough, then even if the MTTR is high, you can still document five 9's reliability. So the actual requirements are other than what is stated. Which is not news. ;-)

Tony

--------------------

Tony,

I understand what you are saying. I am use to very large systems. If I want to have more than resistors on the modules I cant get the MTBF high enough to keep MTTR from killing me. Some companies (not implying yours), can play tricks with the MTBF calculations, however, at least one carrier (even telco guys think is too picky) will have a Phd completely dissect those calculations. Regardless of the reality, you always have to sell to the perception, carrier or not. Isn?t perception interference why you chided me on the other thread? ;<)

echo2
goundan
goundan
12/5/2012 | 1:55:04 AM
re: Cisco Sprints Ahead With HFR
Can anyone comment on the veracity of this article? Is it traditional Crisco FUD or is this platform tied to only new hardware like the HFR? Are they planning a complete overhaul of IOS for existing hardware?

http://www.nwfusion.com/news/2...

Thanks,

Arak
Tony Li
Tony Li
12/5/2012 | 1:54:56 AM
re: Cisco Sprints Ahead With HFR
echo2,

Pardon, I thought you were still disagreeing.

Tony
Tony Li
Tony Li
12/5/2012 | 1:54:56 AM
re: Cisco Sprints Ahead With HFR
is there anyone who has seen a 40G line card?

Procket,Juniper and Avici said they all have 40G line card. is it a trick?
-------------

No trick. Note that a 40G line card is NOT necessarily a single 40G circuit, since these line cards are typically modularly designed and can support up to 40G of aggregate bandwidth.

What has not been publically demonstrated is: an OC-768c POS interface that is of production quality and rational price. There is also a need for a paying customer who will find it economically possible to actually buy this product and actually pay the bill when it comes due.

Tony
dpb
dpb
12/5/2012 | 1:54:36 AM
re: Cisco Sprints Ahead With HFR
What has not been publically demonstrated is: an OC-768c POS interface that is of production quality and rational price. There is also a need for a paying customer who will find it economically possible to actually buy this product and actually pay the bill when it comes due.

Before they pay the bill for the linecards they would have probably had to pay the bill for the 40G Y*window DWDM system/transport. Which is way more expensive than the linecards. Afterall, what good are linecards with nothing in the middle.

David Bannister


dpb
dpb
12/5/2012 | 1:54:36 AM
re: Cisco Sprints Ahead With HFR
Can anyone comment on the veracity of this article? Is it traditional Crisco FUD or is this platform tied to only new hardware like the HFR? Are they planning a complete overhaul of IOS for existing hardware?

A new OS with more features etc will probably need more resources. With that known you can almost rest asured that older platforms will not be supported. The question becomes, how old? For that contact your cisco rep, if you don't have one you are SOL.

David Bannister


null0
null0
12/5/2012 | 1:54:33 AM
re: Cisco Sprints Ahead With HFR
Thank you Tony,..

... and apparently the HOLB issue can be easily demonstrated as attested to by Jstuart_99 who is giving away a free test plan...

I would also be more than happy to share some information relating to T series HOLB and how it will seriously damage your Boss's wealth, damn those SLA's are going to hurt.

But there again you could always over provision your network and only half fill your routers (not that half filling routers or over provisioning makes a difference) and pray that you'll never be subject to a DoS attack or transient routing failure. Oh and you should hope for another bubble as those kind of economics just don't scale anymore...

Interesting quote from Pradeep in his LR interview..

"If Cisco were to embrace this, they would have to build equipment that has the appropriate mechanisms that can support a broader range of applications. Let me give you some examples: mechanisms for queuing, mechanisms differentiating between packets, mechanisms for deep packet lookup without compromising the rate at which the machines work."

Apparently he is unaware that within the T series architecture low priority traffic can HOLB high priority traffic...

null0
[email protected]-m.fm
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