We have been working with TAC on a 1-3% packet loss problem we are having
with a C7507, and I wanted to see if anyone had any ideas here, or had run
into this type of problem. This is an RSP/4 with 160M. We are running
11.1(20)CA1. It has two VIP2-40's, each with two PA-H port adapters, (4
HSSIs total), an FEIP, an EIP-6 just for some handy ethernet ports, and an
AIP. Its doing bgp and ospf. Thypical processor load is 28%. We were
seeing lots of ignores on the HSSI and FE interfaces, lots being 1-3%, and
at times we would lose three or four keepalives in a row, and drop the line
protocol. We are forwarding about 35,000 pps (adding up all the ins and
outs and dividing by 2). We have swapped out all the hardware, thinking
that if the box is having pain at 35,000 pps there must be something
broken. That did not help. Yesterday we set the mtu to 1500 on the local
HSSI point-to-points and that helped the hssi ports grandly. However, we
still see a lot of ignored packets on the FE port.
We are doing flow/distributed switching.
None of the ports is maxing out bandwidth, but they are mostly pretty busy,
around 50%.
Are we just hitting the performace limit of this box? does anyone have any
ideas or experience they could share?
Regards,
Dave.
--
A MRNet - Internet in Minnesota since 1987
-----/|\--------------------------------------------------------------+
- / | \ Dave Bergum, Sr. Network Engineer <bergum@MR.Net> |
- /__|__\ 2829 University Av SE, Gab: (612)362-5812 |
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-~~~~~~~~~~~~~ Minneapolis, MN 55414 Beep: (612)203-1605 |
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