A few years ago, and I think on Solaris 8, Marcus Heckel went up to
64,000 logical interfaces on a 280R, and drove over 200 web hits per
second against them with one instance of Apache driving 1,000 IP
addresses.  Dropping that down to 2,000 interfaces and with separate
Apache instances, he had 1,700 hits per second. So, even on older
Solaris, older kit, and with Apache, we were able to demonstrate
impressive scalability. I wonder what results would be seen on Solaris
10 and a Niagara...

-- Jeff 

On Thu, 2006-08-03 at 14:28, Steffen Weiberle wrote:
> Based on an internal question of how many logical interfaces a non global 
> zone can have, I did some 
> sanity testing. But before that, the general answer include:
> There is no limit to the interfaces presented to a NGZ
> Limits, if any, are at the system level.
> Currently the default is 256 total (1 "physical", the rest logical, per 
> interface) with a maximum 
> set via ndd to 8192 (8K).
> This is per interface, and if a physical interface (e.g. e1000g1[:1..X]) has 
> VLANs, then this is per 
> VLAN (e1000g1000[:1..X], e1000g1001[:1..X], etc.), where X is determined by 
> ip_addrs_per_if.
> Some applications may not behave well when there are so many interfaces 
> present. Even within a 
> non-global zone.
> But I wanted to try this out. First test was adding interfaces to a running 
> zone, via 'ifconfig ... 
> addif ... zone ...'. I added over 7000. So ifconfig(1m) does not limit this.
> So the real question was does zonecfg cause a limit. The answer is that I did 
> not reach one. I 
> created a config file that had over 8000 'add net' entries. The zone 
> configured, installed, and 
> booted. Only issue was during initial boot with sysidnet taking forever, even 
> with a sysidcfg file, 
> and an NFS service going into maintenance mode.
> svc:/network/nfs/status:default (NFS status monitor)
>   State: maintenance since Thu Aug 03 13:45:32 2006
> Reason: Restarting too quickly.
>     See: http://sun.com/msg/SMF-8000-L5
>     See: statd(1M)
>     See: /var/svc/log/network-nfs-status:default.log
> Impact: This service is not running.
> Steffen
> PS. I was impressed with the linearity of ifconfig going through 8K 
> interfaces.
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