Overruns on 6500 platform ingress usually means there's nowhere to send
the traffic coming in (i.e. whatever port it's trying to send the
traffic TO is overloaded with output drops or the fabric is full to the
egress port). So check where the traffic is going (like if it's going
to a 1g port ingressing on this 4x 10g)
On 3/3/2017 12:04 PM, Peter Kranz wrote:
On a WS-X6908-10G DCEF2T line card with SUP2T's, I ran into overruns
yesterday on a 4x10G etherchannel that I am at a loss to resolve:
Constantly increasing overrun counter:
6418130558941 packets input, 9277559958229871 bytes, 0 no buffer
Received 668274 broadcasts (0 IP multicasts)
0 runts, 190 giants, 0 throttles
192 input errors, 1 CRC, 0 frame, 51591389 overrun, 0 ignored
Latency into the router rose by 40ms when these overrun's started to appear
This happened at a BW of ~28 Gbps
I've built the etherchannel in this manner:
Index Load Port EC state No of bits
------+------+------------+------------------+-----------
0 0A Te1/1 Active 2
3 81 Te1/2 Active 2
1 60 Te1/3 Active 2
2 14 Te1/4 Active 2
Is it necessary to instead stagger 1/1, 1/3, 1/5, 1/7 to spread the load
across the card ASICs? I didn't think the WS-X6908 was an oversubscribed
card so didn't bother initially.
Peter Kranz
www.UnwiredLtd.com <http://www.unwiredltd.com/>
Desk: 510-868-1614 x100
Mobile: 510-207-0000
[email protected] <mailto:[email protected]>
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
