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New Member

hi need help on this cisco 1921 router full, auto & half duplex

we have this old 1841 series router and we change to 1921, i just similarly set the settings same, but only this duplex  thing is having problem (i think).

we are supposedly to have 20mbps up&download speed using this 1841, and if we use 1921 20down/ 10upload speed.  

when i set gi0/1 to duplex full it goes down down. but if i set duplex to auto, it register as halfduplex and internet will work but only 10mbps upload. see below

igabitEthernet0/1 is up, line protocol is up
  Hardware is CN Gigabit Ethernet, address is 0000000
  Description: "Connected to Tel"
  Internet address is 000000
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 13/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Half Duplex, 100Mbps, media type is RJ45
  output flow-control is unsupported, input flow-control is unsupported
  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: 0/75/14/10242 (size/max/drops/flushes); Total output drops: 79729
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 5400000 bits/sec, 546 packets/sec
  5 minute output rate 719000 bits/sec, 390 packets/sec
     170608043 packets input, 1963069286 bytes, 79501 no buffer
     Received 477 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 4 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     160510262 packets output, 1965851816 bytes, 0 underruns
     0 output errors, 4095435 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

 

i appreciate your feedback and thanks a lot

 

  • WAN Routing and Switching
1 ACCEPTED SOLUTION

Accepted Solutions
VIP Purple

It is very likely that the

It is very likely that the provider has configured his device for 100 MBit which was compatible with the FE-interface of your 1841. If you configure the 1921 to a fixed speed of 100MBit and full-duplex it should probably work.

-- Don't stop after you've improved your network! Improve the world by lending money to the working poor: http://www.kiva.org/invitedby/karsteni
2 REPLIES
VIP Purple

It is very likely that the

It is very likely that the provider has configured his device for 100 MBit which was compatible with the FE-interface of your 1841. If you configure the 1921 to a fixed speed of 100MBit and full-duplex it should probably work.

-- Don't stop after you've improved your network! Improve the world by lending money to the working poor: http://www.kiva.org/invitedby/karsteni
New Member

thanks a lot. it workssss

thanks a lot. it workssss

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