[c-nsp] 2950 Performance Problem

[Reuben Farrelly]

What version of code is running on the 2950 switch? I had atrocious
performance between two ports on the same VLAN on a 2950 with 12.1.13-EA but
an upgrade to 12.1.20-EA1a fixed it.  I know that's not quite your problem
but still..

Reuben



----- Original Message ----- 
From: "Joe Goldberg" <joseph at ezzi.net>
To: "'Joe Baidoo'" <Joe.Baidoo at FFastFill.com>; "'Sam Stickland'"
<sam_ml at spacething.org>
Cc: "'Ryan O'Connell'" <ryan at complicity.co.uk>; <cisco-nsp at puck.nether.net>
Sent: Tuesday, July 27, 2004 2:48 AM
Subject: RE: [c-nsp] 2950 Performance Problem


> To the best of my knowledge, the 2950 only supports dot1q trunking.  There
> is no apparent option to set the trunk type as there is in the 3524
(unless
> I am missing something).
>
> The way you describe below is how I have my 3524's setup and they work
fine.
>
> Thanks,
> Joe
>
> -----Original Message-----
> From: Joe Baidoo [mailto:Joe.Baidoo at FFastFill.com]
> Sent: Monday, July 26, 2004 8:52 AM
> To: Sam Stickland; Joe Goldberg
> Cc: Ryan O'Connell; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] 2950 Performance Problem
>
> Hi Joe,
>
> I thought i should mention this from your switch config below, you haven't
> set the encapsulation type either ISL or dot1q. Check to ensure the two
> switches have the same native vlan and its being allowed across the two
> trunks. See the sript below it may be useful.
>
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 400, etc ....
>  switchport mode trunk
>
> -----Original Message-----
> From: Sam Stickland [mailto:sam_ml at spacething.org]
> Sent: 26 July 2004 13:33
> To: Joe Goldberg
> Cc: 'Ryan O'Connell'; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] 2950 Performance Problem
>
>
> What is the Cisco 6509 config on the other end of the trunk?
>
> S
>
> On Fri, 23 Jul 2004, Joe Goldberg wrote:
>
> >
> > Thanks for you response.  I have checked for errors on both end of the
> line
> > and I am not seeing any.  The 6509 is set up as a simple dot1q trunk,
> > nothing crazy or tricky.  I should mention though that the 6509 has an
> MSFC2
> > in it that is doing all the VLAN routing.
> >
> > As for the pings, when the 2950 gets to its max load (at least in the
> state
> > it is now) of 12Mbps I start to drop pings of any size both to the
switch
> > and to servers that hang off the switch.  The servers on the switch drop
> > pings outbound also.
> >
> > Following your good idea, I tried putting two servers on the same vlan
and
> > got very good performance between the two on the same switch.  This
would
> > definitely point to an issue in the trunk, but I am still at a loss as
to
> > what that may be.
> >
> > Here is just a snippet of code so you can see what I am doing on the
2950:
> >
> > interface FastEthernet0/20
> >  switchport access vlan 618
> >  no ip address
> > !
> > interface FastEthernet0/21
> >  switchport access vlan 617
> >  no ip address
> > !
> > interface FastEthernet0/22
> >  switchport access vlan 616
> >  no ip address
> > !
> > interface FastEthernet0/23
> >  switchport access vlan 615
> >  no ip address
> > !
> > interface FastEthernet0/24
> >  switchport mode trunk
> >  no ip address
> >  duplex full
> >  speed 100
> >
> > Thanks again for you assistance.
> >
> > Joe