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New Member

Inpurt frames errors on gigabit connection to provider.

We have two ASR1006 routers, one at each remote site, connected into a provider's optical WAN network.  The provider hands us a gigabit ethernet link at both ends.

Both the ASR1006s are running  asr1000rp2-advipservicesk9.03.06.01.s.152-2.S1.bin.  We are using EIGRP as the routing protocol. Here's the problem:

EIGRP doesn't form a neighbor relationship between the two remote routers. On one side, the router drops the EIGRP connection stating too many retransmissions.  The other router gigabit interface reports input frame errors, which increase every couple of seconds. On that interface, I've replaced the fiber SFP and the fiber to the provider's switch but the errors continue.  The provider put a loopback on his equipment toward our router interface and the frame errors stopped.  The provider then removed that loopback and put a loopback toward our interface on his equipment on the other side of his optical WAN.  The input frames errors started up again.

Is it looking like the frame errors are coming from the provider's equipment?  Are frame errors link local? In other words, can a frame error be generated several hops away and be past through a network?  I was under the impression that a frame error would not travel through several pieces of equipment, but would be dropped by the first downstream piece of hardware that receives the frame.  But maybe I'm incorrect.

Thanks for any input.        

4 REPLIES
New Member

Inpurt frames errors on gigabit connection to provider.

Correct, the errors should be local and not passed through the network. What type of errors are you seeing? Can you post a show interface output?

New Member

Inpurt frames errors on gigabit connection to provider.

Here is the output of 'show interface' you requested.  I did it again a couple seconds later to show the input frame errors increasing.  

TSC-ASR1006-A#sh int g0/2/0

GigabitEthernet0/2/0 is up, line protocol is up

  Hardware is SPA-2X1GE-V2, address is c464.13f2.7820 (bia c464.13f2.7820)

  Description: To LLT-RT7604B-g2/0/1- Century Link ID:ETH1000-15143283

  Internet address is xx.xx.xx.xx/30

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 128/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  Full Duplex, 1000Mbps, link type is force-up, media type is ZX

  output flow-control is on, input flow-control is on

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 1d19h, output 00:00:54, output hang never

  Last clearing of "show interface" counters 8w1d

  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: Class-based queueing

  Output queue: 0/40 (size/max)

  30 second input rate 0 bits/sec, 0 packets/sec

  30 second output rate 0 bits/sec, 0 packets/sec

     452439794 packets input, 37589912464 bytes, 0 no buffer

     Received 91 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     307192 input errors, 0 CRC, 307192 frame, 0 overrun, 0 ignored

     0 watchdog, 3701 multicast, 0 pause input

     256328 packets output, 35869710 bytes, 0 underruns

     0 output errors, 0 collisions, 33 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

TSC-ASR1006-A#sh int g0/2/0

GigabitEthernet0/2/0 is up, line protocol is up

  Hardware is SPA-2X1GE-V2, address is c464.13f2.7820 (bia c464.13f2.7820)

  Description: To LLT-RT7604B-g2/0/1- Century Link ID:ETH1000-15143283

  Internet address is xx.xx.xx.xx/30

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 128/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  Full Duplex, 1000Mbps, link type is force-up, media type is ZX

  output flow-control is on, input flow-control is on

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 1d19h, output 00:00:10, output hang never

  Last clearing of "show interface" counters 8w1d

  Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: Class-based queueing

  Output queue: 0/40 (size/max)

  30 second input rate 0 bits/sec, 0 packets/sec

  30 second output rate 0 bits/sec, 0 packets/sec

     452439794 packets input, 37589912464 bytes, 0 no buffer

     Received 91 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     307196 input errors, 0 CRC, 307196 frame, 0 overrun, 0 ignored

     0 watchdog, 3701 multicast, 0 pause input

     256331 packets output, 35870224 bytes, 0 underruns

     0 output errors, 0 collisions, 33 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

New Member

Inpurt frames errors on gigabit connection to provider.

Please also post "show controller ethernet-controller GigabitEthernet0/2/0".

Are you using ZX GBICs? Keep in mind that the minimum link distance for ZX GBICs is 6.2 miles (10 km) with an 8-dB attenuator installed at each end of the link. Without attenuators, the minimum link distance is 24.9 miles (40 km).

New Member

Inpurt frames errors on gigabit connection to provider.

The ASR1006 doesn't have the command 'show controller ethernet-controller....'.  I did find this command though:

TSC-ASR1006-A#sh platform hardware port 0/2/0 plim statistics

Interface 0/2/0

  RX Low Priority

    RX Drop Pkts 0           Bytes 0         

    RX Err  Pkts 0           Bytes 0         

  TX Low Priority

    TX Drop Pkts 0           Bytes 0         

  RX High Priority

    RX Drop Pkts 0           Bytes 0         

    RX Err  Pkts 0           Bytes 0         

  TX High Priority

    TX Drop Pkts 0           Bytes 0         

Also, here is the output of 'show hw-module subslot 0/2 transceiver 0 status':

TSC-ASR1006-A#sh hw-module subslot 0/2 transceiver 0 status

The Transceiver in slot 0 subslot 2 port 0 is enabled.

  Module temperature                        = +19.617 C

  Transceiver Tx supply voltage             = 3173.0 mVolts

  Transceiver Tx bias current               = 8680 uAmps

  Transceiver Tx power                      =  2.7 dBm

  Transceiver Rx optical power              = -14.0 dBm

Reading the specs for the ZX the RX light levels should fall between -23db and 0db, which it does in the above output.

I'll get with the carrier and make sure we have the correct transceiver, although we did change out the ZX with an LX earlier and were still getting frame errors.

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