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2600 Router w Cable Modem

Hey All

I have a cable modem with my 2600 Router and i have a little speed problem when im going out to the web via my F0/0.. according to regular speed test sites my speed is around 20mbps but when i hook up to my modem directly i get a solid 40mbps.. now ive changed my Cat 6 cable from my modem to my router and this are my settings in the router

interface FastEthernet0/0

description Modem

ip address 192.168.0.2 255.255.255.0

ip nat outside

ip virtual-reassembly

speed 100

full-duplex

interface FastEthernet0/1

description R1 to SW1

ip address 192.168.1.1 255.255.255.0

ip nat inside

ip virtual-reassembly

speed 100

full-duplex

Details..

FastEthernet0/0 is up, line protocol is up

  Hardware is AmdFE, address is 000d.29a0.a480 (bia 000d.29a0.a480)

  Description: Modem

  Internet address is 192.168.0.2/24

  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 00:00:03, output 00:00:01, output hang never

  Last clearing of "show interface" counters never

  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 454000 bits/sec, 51 packets/sec

  5 minute output rate 164000 bits/sec, 38 packets/sec

     43336 packets input, 50257913 bytes

     Received 68 broadcasts, 0 runts, 0 giants, 0 throttles

     153 input errors, 45 CRC, 21 frame, 7 overrun, 101 ignored

     0 watchdog

     0 input packets with dribble condition detected

     34477 packets output, 17800631 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     6 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

FastEthernet0/1 is up, line protocol is up

  Hardware is AmdFE, address is 000d.29a0.a481 (bia 000d.29a0.a481)

  Description: R1 to SW1

  Internet address is 192.168.1.1/24

  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 00:00:00, output hang never

  Last clearing of "show interface" counters never

  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 151000 bits/sec, 33 packets/sec

  5 minute output rate 411000 bits/sec, 47 packets/sec

     36229 packets input, 18117969 bytes

     Received 572 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

     45394 packets output, 50061986 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

     86 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     11 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

I see some drops and lost carriers but not sure what those might mean.. ideas?

Thank you all!

2 REPLIES
Hall of Fame Super Gold

2600 Router w Cable Modem

Errrr ... With CEF enabled, the 2600 router (if memory serves me correct) can process up to 18 mbps of data.  The value is expressed in HALF duplex and no encryption.

So, if you have a 40 mbps cable modem ...

Bronze

2600 Router w Cable Modem

Did you measure the speed at different times to get a reading from router and modem?

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