Broadcom chipset limitations Was: Switch/Router

Denys Fedoryshchenko denys at
Wed Dec 13 01:06:24 CST 2017

What are those limitations?

I started to be afraid from those, because just hit recently nasty hash 
collision issue with EX4550,
with declared 32k mac's it badly choked on 28k macs, and even magic 
"mac-lookup-length" didn't helped.

I'm considering EX4600, but afraid from it and that possibly other 
juniper models have hash collision issues too.
(As said on KB32325, affected models EX3200, EX3300, EX4200, EX4500, 
EX4550, and EX6210 have 8192 hash table FDB entries, but it might be 
And till now vendor didn't make troubleshooting of this problem easier, 
when you upgrade from 12.x to 15.x, you get dead RE hitting load average 
and you can't even ssh to switch.

On 2017-12-12 17:37, Chuck Anderson wrote:
> Juniper MX150, except only single PS.  But they are cheap enough you
> could buy two.  Upside: most of the MX feature set is available
> because it is vMX (software) inside.
> QFX5110 is more expensive but has more ports and dual PS.  Downside:
> Broadcom chipset limitations.
> On Tue, Dec 12, 2017 at 09:47:17AM -0500, K MEKKAOUI wrote:
>> Hi
>> I am looking for a router preferably (or switch) with the following 
>> specs:
>> 1-      Carrier grade
>> 2-      Dual power supply
>> 3-      1RU
>> 4-      Gig and 10Gig interfaces.
>> 5-      Does support protocols like BGP, etc.
>> Any recommendation please? Your help will be appreciated.

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