[c-nsp] Cisco 2811 performance issue - dual(new) isp

Chuck Church chuckchurch at gmail.com
Tue Dec 20 13:51:19 EST 2011


Are you sure your NAT/PAT statements are right?  I think you said in an
earlier email this output below was done right after the speedtest.
However, the 5 minute load interval for fa0/1 shows only 1 pps output on
this interface.  The input packets look like all ARP, based on the int
switching info.  Is your traffic really going out the original circuit?

Chuck

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jmail Clist
Sent: Tuesday, December 20, 2011 9:58 AM
To: Daniel Hooper
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Cisco 2811 performance issue - dual(new) isp

Here is a show proc, show ip traffic and show int switching. Any feedback
is very much appreciated.

rtr2811#show proc cpu sorted 1min
CPU utilization for five seconds: 26%/17%; one minute: 13%; five minutes:
13%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
  80    95570780   257773304        370  1.83%  1.75%  1.76%   0 IGMP
Snooping Re
 118    83345888   278039819        299  1.51%  1.59%  1.67%   0 IP
Input
  19     8380332    26051685        321  2.31%  1.33%  1.34%   0 ARP
Input
 182      382324  1277585313          0  1.35%  1.14%  1.12%   0 HQF Shaper
Backg
  92    18735164    59773255        313  0.63%  0.51%  0.50%   0
ILPM
 125       10440        8415       1240  0.00%  0.45%  0.73% 514 SSH
Process
   3     2156048    19855473        108  0.31%  0.31%  0.31%   0 Skinny Msg
Serve
 314      166160   160658064          1  0.31%  0.31%  0.31%   0 PPP
manager
   5    10986872      783696      14019  0.00%  0.21%  0.18%   0 Check
heaps
 315       86412   160658064          0  0.15%  0.14%  0.15%   0 PPP
Events
  91     6677076     5139100       1299  0.15%  0.12%  0.13%   0
tCOUNTER
--------------------
rtr2811#sh ip traffic
IP statistics:
  Rcvd:  5677 total, 231 local destination
         0 format errors, 0 checksum errors, 7 bad hop count
         0 unknown protocol, 5358 not a gateway
         0 security failures, 0 bad options, 0 with options
  Opts:  0 end, 0 nop, 0 basic security, 0 loose source route
         0 timestamp, 0 extended security, 0 record route
         0 stream ID, 0 strict source route, 0 alert, 0 cipso, 0 ump
         0 other
  Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
         0 fragmented, 0 fragments, 0 couldn't fragment
  Bcast: 33 received, 0 sent
  Mcast: 0 received, 21 sent
  Sent:  225 generated, 11351 forwarded
  Drop:  3 encapsulation failed, 0 unresolved, 0 no adjacency
         0 no route, 0 unicast RPF, 0 forced drop
         0 options denied
  Drop:  0 packets with source IP address zero
  Drop:  0 packets with internal loop back IP address
         0 physical broadcast
ICMP statistics:
  Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 0 unreachable
        60 echo, 0 echo reply, 0 mask requests, 0 mask replies, 0 quench
        0 parameter, 0 timestamp, 0 timestamp replies, 0 info request, 0
other
        0 irdp solicitations, 0 irdp advertisements
        0 time exceeded, 0 info replies
  Sent: 32 redirects, 0 unreachable, 0 echo, 61 echo reply
        0 mask requests, 0 mask replies, 0 quench, 0 timestamp, 0 timestamp
replies
        0 info reply, 0 time exceeded, 0 parameter problem
        0 irdp solicitations, 0 irdp advertisements
UDP statistics:
  Rcvd: 40 total, 0 checksum errors, 34 no port
  Sent: 23 total, 0 forwarded broadcasts
TCP statistics:
  Rcvd: 135 total, 0 checksum errors, 0 no port
  Sent: 116 total
BGP statistics:
  Rcvd: 0 total, 0 opens, 0 notifications, 0 updates
        0 keepalives, 0 route-refresh, 0 unrecognized
  Sent: 0 total, 0 opens, 0 notifications, 0 updates
        0 keepalives, 0 route-refresh
IP-EIGRP statistics:
  Rcvd: 0 total
  Sent: 0 total
PIMv2 statistics: Sent/Received
  Total: 0/0, 0 checksum errors, 0 format errors
  Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0,  Hellos:
0/0
  Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0
  Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0
  Queue drops: 0
  State-Refresh: 0/0
IGMP statistics: Sent/Received
  Total: 0/0, Format errors: 0/0, Checksum errors: 0/0
  Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0
  DVMRP: 0/0, PIM: 0/0
  Queue drops: 0
OSPF statistics:
  Rcvd: 0 total, 0 checksum errors
        0 hello, 0 database desc, 0 link state req
        0 link state updates, 0 link state acks
  Sent: 0 total
        0 hello, 0 database desc, 0 link state req
        0 link state updates, 0 link state acks
ARP statistics:
  Rcvd: 2916 requests, 0 replies, 0 reverse, 0 other
  Sent: 2 requests, 5 replies (0 proxy), 0 reverse
  Drop due to input queue full: 0
rtr2811#
------------------
FastEthernet0/1 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0015.f956.d549 (bia
0015.f956.d549)
  Internet address is 200.200.200.200/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:02, output hang never
  Last clearing of "show interface" counters 00:04:13
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 115000 bits/sec, 64 packets/sec
  5 minute output rate 18000 bits/sec, 1 packets/sec
     24064 packets input, 9171019 bytes
     Received 17645 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     4516 packets output, 2399483 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
------------------------
sh int switching
FastEthernet0/1
          Throttle count         10
                   Drops         RP         10         SP          0
             SPD Flushes       Fast          0        SSE          0
             SPD Aggress       Fast          0
            SPD Priority     Inputs   15397736      Drops          0
    Protocol  IP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process      49490   16769897      30321    3863531
            Cache misses          0          -          -          -
                    Fast     249838  281487351     229388  101233546
               Auton/SSE          0          0          0          0
    Protocol  DEC MOP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0       8548     658196
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0
     Protocol  ARP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process   15397767  923866020        919      55140
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0
    Protocol  CDP
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0       4675    1907390
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0
Protocol  Other
          Switching path    Pkts In   Chars In   Pkts Out  Chars Out
                 Process          0          0     514555   30873300
            Cache misses          0          -          -          -
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0
    NOTE: all counts are cumulative and reset only after a reload.


On Tue, Dec 20, 2011 at 2:03 AM, Daniel Hooper <dhooper at gold.net.au> wrote:

> I have no faith in sites like speedtest.net actually reporting the true
> speed of your link.
>
> Use your ISP's local FTP site  & mirror sites or find one close to them
> upstream and perform testing.
>
> -Dan
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:
> cisco-nsp-bounces at puck.nether.net] On Behalf Of Jmail Clist
>  Sent: Tuesday, 20 December 2011 11:42 AM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Cisco 2811 performance issue - dual(new) isp
>
> I have attached another log called "latest_2811_logs". it contains the "sh
> ip traffic, sh int switching and a "show proc cpu sorted 1min" output
> immediately after doing a test on speedguide.net through the new isp2
> connection. I see some throttle drops but not much more. I'm still puzzled
> at the poor performance. I put the interface back to auto as well and teh
> results are the same. Any ideas?
>
> On Mon, Dec 19, 2011 at 9:03 PM, Christopher J. Wargaski
> <wargo1 at gmail.com>wrote:
>
> > According to
> > http://www.cisco.com/web/partners/downloads/765/tools/quickreference/r
> > outerperformance.pdf, the router can handle up to 16.44 Mbps of fast /
> > CEF switching. I was not able to see your attachments in the digest
> > nor in the archive. Do you have CEF enabled?
> >
> > cjw
> >
> >
> > Date: Mon, 19 Dec 2011 10:57:11 -0600
> >> From: Jmail Clist <jmlist80 at gmail.com>
> >>
> >> To: cisco-nsp at puck.nether.net
> >> Subject: [c-nsp] Cisco 2811 performance issue - dual(new) isp
> >> Message-ID:
> >>        <CAO8NJwLyKmQj8jUJTYg2_82fyxyyQLRuCOraaeH3BG9ONPr8=
> >> Q at mail.gmail.com>
> >> Content-Type: text/plain; charset="iso-8859-1"
> >>
> >>
> >> Hello,
> >>
> >> I have an issue that is really causing me grief. I recentely
> >> inherited a small network. There is an existing 1.5mbps Internet
> >> connection (fa0/0) (includes MPLS as well/same provider). We added a
> >> new ISP that allows for 50mb down/5mb up. I added the new ISP to
> >> fa0/1 and modified the NAT overload statements accordingly. I alo
> >> changed the default route to ONLY use the new, faster ISP connection.
> >> Using speedguide.net, I am only able to get 6 to 10mb down, most of
> >> the time. if I plug a laptop into the cable modem then I get 37 to
> >> 50mb down. Any idea why the 2811 is so slow? How much download speed
> >> can I expect to get? Any assisstance would be very much appreciated.
> >>
> >> I have attached the config and various show outputs (nat, sh ver,
> >> memory, etc.).
> >>
> >> Thank you,
> >>
> >
>
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