Ahh. I was looking at the block diagram for the GE-TX and just assumed
it was the same for SFP.
Thanx for the correction.
-Ben
On Oct 28, 2010, at 12:10 PM, Tim Stevenson wrote:
On the fiber (SFP) card, ports are indeed mapped in groups of 12
consecutive odd/12 consecutive even ports per rohini, with 24 odd
ports on one janus & 24 even ports on the other.
I'd guess you're just running out of replication bandwidth. A bit
more detail about the traffic pattern etc would help. How many L3
replications are occurring here, and for what input rate? Ingress or
egress replication?
As a general rule you should spread the receivers as evenly as
possible among odd & even ports to spread the replication load.
Hope that helps,
Tim
At 08:37 AM 10/28/2010, Ben Lovell (belovell) uttered:
Nothing that I can think of. One Super Santa Anna and Janus run ports
1-24 and another pair of them run ports 25-48. One Rohini runs each
consecutive group of 12 ports. The only thing I could guess at is the
path take across the switchbar fabric but I don't recall how we
select
FPOE right now.
-Ben
On Oct 27, 2010, at 12:54 PM, John Neiberger wrote:
> This is a good one. I'm working with TAC on it, but I thought i'd
> share it here, too, just because it's so unusual. We're seeing
> intermittent drops on a multicast video stream and we haven't been
> able to determine why. This is the second time we've seen this
bizarre
> behavior. At the urging of the TAC engineer, we tried moving
receivers
> to different ports and noticed that we only see the drops when the
> receiver is connected to even-numbered interfaces! Odd-numbered
> interfaces are not affected.
>
> This is on a 7600 with SUP 720-3BXL and a 6748 linecard. What
part of
> the 6748 linecard architecture is responsible for a behavior
> difference between odd- and even-numbered ports? This is a
WS-6748-SFP
> with a DFC-3BXL.
>
> Any thoughts?
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Tim Stevenson, [email protected]
Routing & Switching CCIE #5561
Distinguished Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
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