On 08/10/2010 11:46 PM, Mack McBride wrote:
What about software switched traffic (mostly glean traffic)?
Doesn't that get handled by the RP?
Yes. But such traffic must come in via a gigE or vlan interface, and
ERSPAN can capture it there (in hardware)
You can *also* span the RP/SP itself,
On Aug 11, 2010, at 2:45 PM, Phil Mayers wrote:
We've used ERSPAN on some truly phenomenal bitrates; it *is* done in hardware.
One thing to keep in mind is to be sure and transport ERSPAN traffic over the
DCN or a dedicated telemetry export network so as to avoid the hall-of-mirrors
effect.
On Wed, 11 Aug 2010, Phil Mayers wrote:
We've used ERSPAN on some truly phenomenal bitrates; it *is* done in
hardware.
Sending ERSPAN is done in hw, I've done multigigabit ERSPAN.
ERSPAN reception is not done in HW (at least not when I tested) and it
killed the box when I tried :P
--
On 08/11/2010 09:02 AM, Mikael Abrahamsson wrote:
On Wed, 11 Aug 2010, Phil Mayers wrote:
We've used ERSPAN on some truly phenomenal bitrates; it *is* done in
hardware.
Sending ERSPAN is done in hw, I've done multigigabit ERSPAN.
ERSPAN reception is not done in HW (at least not when I
On Wed, 11 Aug 2010, Phil Mayers wrote:
FWIW we seldom (In fact I'm not sure ever!) use an actual 6500 as an
erspan receiver; we use gulp on a Unix box, or the wireshark ERSPAN
decoder, depending on the requirements.
Yes, I usually tcpdump it to a pcap file and analyse it with wireshark.
--
It most certainly is done in h/w - as I said, both encap decap (ie
source dest sessions) are hw based. At the dest box, the FE strips
off the GRE/ERSPAN header dumps the original packet on the SPAN dest port.
Note that certain misconfigurations can cause a punt, particularly on
the ERSPAN
Hi list,
Does someone have experience with erspan on a 7600?
Is this loading the CPU (rsp720 / ws-x6748-ge-tx) or is it handled in
hardware?
Martin
___
cisco-nsp mailing list cisco-nsp@puck.nether.net
Hi Martin,
ERSPAN is handled by the hardware, either the central replication
engine on the sup, or by the REs on the linecards themselves (depends
on which sup LCs you have).
In no case do we use the sup CPU to perform ERSPAN encap/decap.
Tim
At 07:10 AM 8/10/2010, Martin Moens averred:
Thanks Tim,
Exactly what I wanted to hear :-)
Martin
Tim Stevenson mailto:tstev...@cisco.com wrote on 10/08/2010 16:59:
Hi Martin,
ERSPAN is handled by the hardware, either the central replication
engine on the sup, or by the REs on the linecards themselves (depends
on which sup LCs you
, August 10, 2010 8:59 AM
To: Martin Moens; cisco-nsp@puck.nether.net
Subject: Re: [c-nsp] Erspan on 7600
Hi Martin,
ERSPAN is handled by the hardware, either the central replication
engine on the sup, or by the REs on the linecards themselves (depends
on which sup LCs you have).
In no case do we
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