PPP multilink help

Andrey Gordon andrey.gordon at gmail.com
Mon May 11 12:01:24 CDT 2009


To address the concerns about the overhead (FTP is still transferring that
file:

core.bvzn#sh proc cpu hist

core.bvzn   12:44:07 PM Monday May 11 2009 EST



    333344444222222222222222222223333333333222222222233333222222
100
 90
 80
 70
 60
 50
 40
 30
 20
 10
   0....5....1....1....2....2....3....3....4....4....5....5....6
             0    5    0    5    0    5    0    5    0    5    0
               CPU% per second (last 60 seconds)


                                             4     4
    333334344353344455444444444554544445455664445551444445454544
100
 90
 80
 70
 60
 50
 40                                          *     *
 30                                          *     *
 20                                          *     *
 10           *     **         ** *    * ****#  ***#     * * *
   0....5....1....1....2....2....3....3....4....4....5....5....6
             0    5    0    5    0    5    0    5    0    5    0
               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%

                                                                       1
    433433344444434344444444443344444433444443444433333333434444344334301332
    497289281236443538550242449336950644007664423513486377362431706922208088
100                                                                    *
 90                                                                    *
 80                                                                    *
 70                                                                    *
 60                                                                    *
 50        *   *     ***         *** *    ***    *                *    *
 40 ****** ****** ************* ******  ***** ****   ** ************ * *  *
 30 ******************************************************************** ***
 20 *******************************************************************#****
 10 *******************************************************************#****
   0....5....1....1....2....2....3....3....4....4....5....5....6....6....7..
             0    5    0    5    0    5    0    5    0    5    0    5    0
                   CPU% per hour (last 72 hours)
                  * = maximum CPU%   # = average CPU%

core.bvzn#sh inv
NAME: "2821 chassis", DESCR: "2821 chassis"
<snip>

Serial0/0/0:1 is up, line protocol is up
  Hardware is GT96K Serial
  Description:
  MTU 1500 bytes, BW 1536 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 149/255, rxload 15/255
  Encapsulation PPP, LCP Open, multilink Open
  Link is a member of Multilink bundle Multilink1, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 14w0d
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair  [suspended, using FIFO]
  FIFO output queue 0/40, 0 drops
  30 second input rate 93000 bits/sec, 86 packets/sec
  30 second output rate 899000 bits/sec, 122 packets/sec
     105433994 packets input, 3520749026 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     155813204 packets output, 1174780375 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     1 carrier transitions
  Timeslot(s) Used:1-24, SCC: 0, Transmitter delay is 0 flags
Serial0/0/1:1 is up, line protocol is up
  Hardware is GT96K Serial
  Description:
  MTU 1500 bytes, BW 1536 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 149/255, rxload 15/255
  Encapsulation PPP, LCP Open, multilink Open
  Link is a member of Multilink bundle Multilink1, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 14w0d
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair  [suspended, using FIFO]
  FIFO output queue 0/40, 0 drops
  30 second input rate 94000 bits/sec, 86 packets/sec
  30 second output rate 898000 bits/sec, 122 packets/sec
     105441924 packets input, 3518841511 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     155734625 packets output, 1156759105 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     1 carrier transitions
  Timeslot(s) Used:1-24, SCC: 1, Transmitter delay is 0 flags

Multilink1 is up, line protocol is up
  Hardware is multilink group interface
  Description: Verizon Business MPLS Circuit
  Internet address is x.x.x.150/30
  MTU 1500 bytes, BW 3072 Kbit/sec, DLY 100000 usec,
     reliability 255/255, txload 148/255, rxload 14/255
  Encapsulation PPP, LCP Open, multilink Open
  Listen: CDPCP
  Open: IPCP, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 2 seconds on reset
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters 14w0d
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 252140
  Queueing strategy: Class-based queueing
  Output queue: 3/1000/0 (size/max total/drops)
  30 second input rate 179000 bits/sec, 172 packets/sec
  30 second output rate 1795000 bits/sec, 243 packets/sec
     207501114 packets input, 1445648459 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     42 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     307484312 packets output, 2277871516 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions


I also ran 6 flows worth of iperf between a server at the site and my laptop
while the transfer was running (iperf -i 2 - P 6 -t 120 -c 10.1.150.4) in
the same direction

core.bvzn#sh policy-map int mu1
 Multilink1

  Service-policy output: QWAS

    queue stats for all priority classes:

      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 0/0

    Class-map: VoIP (match-any)
      0 packets, 0 bytes
      30 second offered rate 0 bps, drop rate 0 bps
      Match:  dscp ef (46)
        0 packets, 0 bytes
        30 second rate 0 bps
      Priority: 100 kbps, burst bytes 2500, b/w exceed drops: 0


    Class-map: interactive (match-any)
      31490239 packets, 14882494949 bytes
      30 second offered rate 4000 bps, drop rate 0 bps
      Match: protocol rdesktop
        10981329 packets, 1277510597 bytes
        30 second rate 3000 bps
      Match: protocol telnet
        1104192 packets, 183832229 bytes
        30 second rate 0 bps
      Match: protocol ssh
        9263601 packets, 11659456657 bytes
        30 second rate 0 bps
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/1103/0
      (pkts output/bytes output) 31489136/14887505365
      bandwidth 500 kbps

    Class-map: class-default (match-any)
      275000011 packets, 120951145536 bytes
      30 second offered rate 1494000 bps, drop rate 0 bps
      Match: any
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops/flowdrops) 0/251092/0/251092
      (pkts output/bytes output) 276085337/122442704318
      Fair-queue: per-flow queue limit 16
core.bvzn#


-----
Andrey Gordon [andrey.gordon at gmail.com]


>



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