pontification bloat (was 10GE TOR port buffers (was Re: 10G switch recommendaton))

Jared Mauch jared at puck.nether.net
Sun Jan 29 20:40:11 UTC 2012

See below

Jared Mauch

On Jan 27, 2012, at 9:13 PM, George Bonser <gbonser at seven.com> wrote:

>> Router(config)# policy-map pol1
>> Router(config-pmap)# class class-default
>> Router(config-pmap-c)# bandwidth per 70
>> Router(config-pmap-c)# random-detect
>> Router(config-pmap-c)# random-detect ecn
>> Requires other bits in the network to be ECN aware, but if they are,
>> good stuff.
>> --
> +1
> There is no excuse these days for stuff not to be ECN aware.  That GREATLY mitigates things as it makes hosts aware pretty much immediately that there is congestion and they don't have to wait for a lost packet to time out.  I brought it up to a Brocade engineer once asking for the option to set ECN rather than drop the packet and he said "nobody uses it".  I told him nobody uses it because you don't have the feature available.  How can anyone use it if you don't have the feature?

This sounds a lot like most peoples ipv6 rationale as well. 

I'm still feeling some scars from last time Ecn was enabled in my hosts. Many firewalls would eat packets with. Ecn enabled. 

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