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@gmail.com]