Guest

Preview Tool

Cisco Bug: CSCuq98983 - FCIP - add per connection stats

Last Modified

Feb 02, 2017

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

6.2(11)FM(0.40)

Description (partial)

Symptom:
The output of command <I>show fcip counters</I> shows input and output rates as well as some parameters of TCP connections in an FCIP tunnel. E.g. -

<pre>abc-5# show fcip counters
fcip1
    TCP Connection Information
      2 Active TCP connections
        Control connection: Local 10.10.9.2:3225, Remote 10.10.9.1:65491
        Data connection: Local 10.10.9.2:3225, Remote 10.10.9.1:65497
        2 Attempts for active connections, 1 close of connections
    TCP Parameters
      Round trip time: Smoothed 28 ms, Variance: 5 Jitter: 28772 us
      Advertized window: Current: 2279 KB, Maximum: 24580 KB, Scale: 5
      Peer receive window: Current: 1965 KB, Maximum: 1965 KB, Scale: 5
      Congestion window: Current: 1188 KB, Slow start threshold: 1950 KB
      Measured RTT : 3048 us Min RTT: 247 us Max RTT: 46820 us
    5 minutes input rate 292259600 bits/sec, 36532450 bytes/sec, 17241 frames/sec
    5 minutes output rate 279801320 bits/sec, 34975165 bytes/sec, 16510 frames/sec
      13582328 frames input, 28775704700 bytes
         1921 Class F frames input, 233572 bytes
         13580407 Class 2/3 frames input, 28775471128 bytes
         216493 Reass frames
         0 Error frames timestamp error 0
      14059386 frames output, 29781015948 bytes
         1966 Class F frames output, 270296 bytes
         14057420 Class 2/3 frames output, 29780745652 bytes
         0 Error frames</pre>

By default, each fcip tunnel consists of 2 tcp connections -- 1 x control and 1 x data. On 10 Gb IP Storage ports, each fcip tunnel may also be configured with 5 tcp connections -- 1 x control and 4 x data. However, the command <I>show fcip counters</I> does not display per-connection, but only cumulative per-tunnel statistics. When 5 tcp connections are configured, since there are multiple data connections, it would be useful to display per-connection statistics.

Conditions:
This enhancement does not affect 1 Gb fcip platforms, such as MDS 9222i switch, or 18+4 and SSN16 linecards (DS-X9304-18K9 and DS-X9316-SSNK9)
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.