[j-nsp] Cisco ASR 9001 vs Juniper MX104

[Stepan Kucherenko]

My biggest gripe with ASR9k (or IOS XR in particular) is that Cisco 
stopped grouping BGP prefixes in one update if they have same attributes 
so it's one prefix per update now (or sometimes two).

Transit ISP we tested it with pinged TAC and got a response that it's 
"software/hardware limitation" and nothing can be done.

I don't know when this regression happened but now taking full feed from 
ASR9k is almost twice as slow as taking it from 7600 with weak RE and 
3-4 times slower than taking it from MX.

I'm not joking, test it yourself. Just look at the traffic dump. As I 
understand it, it's not an edge case so you must see it as well.

In my case it was 450k updates per 514k prefixes for full feed from 
ASR9k, 89k updates per 510k prefixes from 7600 and 85k updates per 516k 
prefixes from MX480. Huge difference.

It's not a show stopper but I'm sure it must be a significant impact on 
convergence time.

On 01.12.2015 20:08, heasley wrote:
> Tue, Dec 01, 2015 at 04:23:33PM +0200, Mark Tinka:
>>> XR is very JunOS like.
>>
>> Hmmmh, not quite.
>>
>> There are still some major cosmetic differences, and a few similarities,
>> and definitely different fundamental architectural principles.
>>
>> Both are okay for their platforms, but I wouldn't go as far as saying
>> they "alike".
>
> I believe that they are vastly different; just from a usability/user-friendly
> PoV, though both have blemishes.
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