[c-nsp] Cisco 7206VXR NPE-G1 mGRE performance

[Pavel Dimow]

Hello,

I have a trouble understanding the problem I have with mGRE on 7206VXR with
NPE-G1 on one side and Cisco ASR 1001 on another. The problem is random
packet loss for example:

7206 -> ASR

Sending 10000, 1300-byte ICMP Echos to 192.168.0.2, timeout is 2 seconds:
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Success rate is 99 percent (2154/2158), round-trip min/avg/max = 1/1/20 ms

When I have a smaller packet size then drops are less frequent but still
present. I tried every hack i know to understand why I lose packets but
without success. CPU looks ok

 CPU utilization for five seconds: 39%/35%; one minute: 35%; five minutes:
34%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  46    98193652 154896559        633  3.91%  3.70%  3.62%   0 IP Input

 136       72748     34815       2089  0.07%  0.00%  0.00%   0 BGP Scanner

   2         380    104377          3  0.00%  0.00%  0.00%   0 Load Meter

   3       25852    985428         26  0.00%  0.00%  0.00%   0 OSPF Hello

   4      203288     52967       3838  0.00%  0.03%  0.00%   0 Check heaps

   5          44       222        198  0.00%  0.00%  0.00%   0 Pool Manager

   6           0         2          0  0.00%  0.00%  0.00%   0 Timers

   7           0         2          0  0.00%  0.00%  0.00%   0 Serial
Backgroun
   8          80    104343          0  0.00%  0.00%  0.00%   0
ALARM_TRIGGER_SC

And the amount of traffic on mGRE tunnel is about 20Mbps. Is this way to
much for NPE-G1 considering there is no hw support for GRE?