[c-nsp] ASR - modular image

Julio Arruda jarruda-cnsp at jarruda.com
Wed Mar 25 05:31:55 EDT 2009


Mohacsi Janos wrote:
> 
> 
> 
> On Wed, 25 Mar 2009, Pshem Kowalczyk wrote:
> 
>> Hi,
>>
>> We're considering getting some ASR (1004 and 1006) as peering routers.
>> I would like to know what sort of experience you had with them.
>> What are the advantages of running the 'modular' IOS XE? We tried the
>> 'modular' software on 6500 and we ran into some issues that we didn't
>> have on the integrated one.
>> Should we expect something similar from the ASR platform?
> 
> Dear Pshem,
>     We started to use ASR 1002 for WAN aggregation a while ago. We did 
> not have much experience with it, but I share what we have:
> 
> - We started to use 'monolithic' IOS XE, but recently upgraded to 
> 'modular' version. We expecting that IOS XE rebuilds, similar to 
> 12.2(x)Tn, where n is the rebuild number,  does not require full reload 
> of the router. We could not prove this yet, since not much rebuild 
> exists for IOS XE. The full reload takes considerable more time than on 
> 7200 or 7600.
> 
> - We wanted to implement QoS on virtual interface templates as we did on 
> 7200. This not supported yet.
> 
> - We wanted to implement IPv6 on PPPoE with this device. however Cisco 
> claims the ASR 1000 series has IPv6 support, the IPv6 support exists 
> only for bridged mode broadband solution. Development of few hundred 
> lines of code is postponed  recently :(
> 
> - The device has more horse-power and potential capabilities than 7200 
> with any NPE. It survived several DoS attacks, while 7200 died.

Interesting, the Control-plane in the IOS-XE, from what I understand, is 
not the legacy piece IOS, correct ? Is this better DDoS survival because 
of the raw CPU power being better, or because the attack was against a 
downstream customer ? The IP under attack was the router itself ? Or 
even better, it was some attack that would 'punt' traffic from the QFP 
to the Route processor ?


> 
> For summary, the ASR100 platform for WAN aggregation is quite ready yet, 
> potentially it will be good in a year time.
> 
> Best Regards,
>         Janos Mohacsi
> 
> 
>>
>> regards
>> Pshem
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