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CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR LEVEL

Hi,

We are having problems with the connection between a router cisco 2811 and switch cisco 3750G.

The interface LAN of the router 2811 is Fastethernet configured with: speed 100 and duplex full.

The interface Gigabit ethernet ofr switch 3750G is configured with: speed: 100 and duplex full.

When we run the command: show interface fastethernet 0/1 at cisco router 2811 we can see a high level of dropped paquet:

ALi_Trujillo_61903#sh int fas

ALi_Trujillo_61903#sh int fastEthernet 0/1

FastEthernet0/1 is up, line protocol is up

  Hardware is MV96340 Ethernet, address is 0007.0e29.1849 (bia 0007.0e29.1849)

  Description: LAN|Alicorp_TRujillo (PRincipal)|CD=61903

  Internet address is 10.232.200.1/16

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 2/255, 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 23:56:38

  Input queue: 0/75/85576/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 279000 bits/sec, 321 packets/sec

  5 minute output rate 827000 bits/sec, 281 packets/sec

     33119734 packets input, 1176559562 bytes

     Received 253084 broadcasts, 0 runts, 0 giants, 7243 throttles

     1747057 input errors, 0 CRC, 0 frame, 0 overrun, 1747057 ignored

     0 watchdog

     0 input packets with dribble condition detected

     30444207 packets output, 174170064 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     8270 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier

     0 output buffer failures, 0 output buffers swapped out

ALi_Trujillo_61903#

ALi_Trujillo_61903#

But at the interface Gigabitethernet of 3750G does not appear any error, all is o.k.

The IOS of the router cisco 2811 is: c2800nm-adventerprisek9-mz.124-19b

Would you be mind telling me if we need to change the router to other models that support gigabit interface to resolve this problem?

Thanking in advance any suggestion.

Attn.

Roger Majo

Everyone's tags (3)
1 ACCEPTED SOLUTION

Accepted Solutions
Super Bronze

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

Like Glen, your initial posting stats could indicate the 3750G is sending large bursts of traffic to the 2811 (small packets would be the most problematic).  The 2811, although it has FastEthernet ports, does not guarantee 100 Mbps line-rate.  What you may need to do is slow or pace the transmission rate from the 3750G to the 2811.  Perhaps the simplest change you might try is to run this connection at 10 Mbps.  Or, you can use QoS features on the 3750G to slow its transmission rate to the 2811.

As to whether a router with a gig interface would work better, really depends on the performance of the router itself.  For example, the next larger model in the 2800 series, the 2821, offers gig interfaces but it too, I recall, doesn't even guarantee 100 Mbps line rates either but this kind of drop should decrease as that model is "faster". (BTW, the newer 2900 series are much "faster" for the same model level, i.e. a 2911 is much "faster" than a 2811.)

8 REPLIES
Purple

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

  That probably means the switch is sending data to the router too fast for it too handle at times . A small router cannot handle traffic as fast as a switch can send it at times so you will see input errors and drops on the interface and why you dont see it on the switch side because it can handle it .

Hall of Fame Super Gold

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Can please post the output to the command "sh controll e  fastEthernet 0/1".  I have a strange feeling this is duplex mismatch error.

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Hi Leolaohoo.

This is the show controllers fastethernet 0/1 output command:

ALi_Trujillo_61903#show controllers fastEthernet 0/1

Interface FastEthernet0/1

Hardware is MV96340

HWIDB: 457372D0, INSTANCE: 45738398, FASTSEND: 42D5B6E4, MCI_INDEX: 0

Aggregate MIB Counters

----------------------

  Rx Good Bytes: 2995076612677         Rx Good Frames: 8953615

  Rx Bad Bytes: 0                      Rx Bad Frames: 0

  Rx Broadcast Frames: 54465           Rx Multicast Frames: 877820

  Tx Good Bytes: 6522900318843         Tx Good Frames: 7062669

  Tx Broadcast Frames: 1448            Tx Multicast Frames: 282

  Rx+Tx Min-64B Frames: 7189388        Rx+Tx 65-127B Frames: 4746308

  Rx+Tx 128-255B Frames: 1108680       Rx+Tx 256-511B Frames: 497751

  Rx+Tx 512-1023B Frames: 281490       Rx+Tx 1024-MaxB Frames: 2192667

  Rx Unrecog MAC Ctrl Frames: 0

  Rx Good FC Frames: 0                 Rx Bad FC Frames: 0

  Rx Undersize Frames: 0               Rx Fragment Frames: 0

  Rx Oversize Frames: 0                Rx Jabber Frames: 0

  Rx MAC Errors: 0                     Rx Bad CRCs: 0

  Tx Collisions: 0                     Tx Late Collisions: 0

PHY Registers

-------------

  Register 0x00:   2100  780D  0040  61E4  0101  C1E1  000C  2001

  Register 0x08:   0000  xxxx  xxxx  xxxx  xxxx  xxxx  xxxx  xxxx

  Register 0x10:   1000  0300  0000  0000  0200  01C4  0200  0000

  Register 0x18:   0037  000D  9F00  008A  0827  0000  0020  000B

  PHY Control (0x00):

  100MBPS FULLDUPLEX

  PHY Status (0x01):

  LINK_UP

  Auto-Negotiation Advertisement (0x04):

  100FD

  Link Partner Ability (0x05):

  100FD 100HD 10FD 10HD

Serial Management Interface Registers (0xB4002000)

--------------------------------------------------

  PHYAR    = 0x00002841    SMIR     = 0x0FE2000B

  EUDAR    = 0x00000000    EUDIDR   = 0x000000E0    EUICR    = 0x00000010

  EUIMR    = 0x00000000    EUEAR    = 0x00000000    EUIAER   = 0x00000000

  BAR0     = 0x00000E00    SR0      = 0x0FFF0000

  BAR1     = 0x00000000    SR1      = 0x00000000

  BAR2     = 0x00000000    SR2      = 0x00000000

  BAR3     = 0x00000000    SR3      = 0x00000000

  BAR4     = 0x00000000    SR4      = 0x00000000

  BAR5     = 0x00000000    SR5      = 0x00000000

  HARR0    = 0x00000000    HARR1    = 0x00000000

  HARR2    = 0x00000000    HARR3    = 0x00000000

  BARER    = 0x0000003E    EPAPR0   = 0x00000003    EPAPR1   = 0x00000003

Port Control Registers (0xB4002800)

-----------------------------------

  PCR      = 0x00000000    PCER     = 0x00000000    MII      = 0x00218823

  GMII     = 0x00000006    VLANET   = 0x00008100    MACLO    = 0x00001849

  MACHI    = 0x00070E29    SDCR     = 0x01000009    DSCP0    = 0x00000000

  DSCP1    = 0x00000000    DSCP2    = 0x00000000    DSCP3    = 0x00000000

  DSCP4    = 0x00000000    DSCP5    = 0x00000000    DSCP6    = 0x00000000

  PSCR     = 0x012A260F    VPT2P    = 0x00000000    PSR      = 0x00000426

  TQCR     = 0x00000000    TQFPC    = 0x000000FF    PTTBRC   = 0x000003FF

  MTU      = 0x00000006    PMTBS    = 0x0000FFFF    ICR      = 0x00000000

  ICER     = 0x00000000    IMR      = 0xF807FFFF    IMER     = 0xFFFFFFFF

  PRFUTR   = 0x00000008    PTFUTR   = 0x00000000    PMFSR    = 0x00000040

  PDFC     = 0x00000000    POFC     = 0x00000000    EUIAER   = 0x00000000

  CRDP0    = 0x0F4440A0    CRDP1    = 0x00000000    CRDP2    = 0x00000000

  CRDP3    = 0x00000000    CRDP4    = 0x00000000    CRDP5    = 0x00000000

  CRDP6    = 0x00000000    CRDP7    = 0x00000000    RQCR     = 0x0003FE01

  TCSDP    = 0x0F4448F0    TCQDP0   = 0x0F4448F0    TCQDP1   = 0x00000000

  TCQDP2   = 0x00000000    TCQDP3   = 0x00000000    TCQDP4   = 0x00000000

  TCQDP5   = 0x00000000    TCQDP6   = 0x00000000    TCQDP7   = 0x00000000

  TQTBCTR0 = 0x01CF20CA    TQTBCFG0 = 0x03FFFFFF    TQARCFG0 = 0x00000006

  TQTBCTR1 = 0x0D169721    TQTBCFG1 = 0x03FFFFFF    TQARCFG1 = 0x00000006

  TQTBCTR2 = 0x32997ABA    TQTBCFG2 = 0x03FFFFFF    TQARCFG2 = 0x00000006

  TQTBCTR3 = 0x16CBC160    TQTBCFG3 = 0x03FFFFFF    TQARCFG3 = 0x00000006

  TQTBCTR4 = 0x0FE974BF    TQTBCFG4 = 0x03FFFFFF    TQARCFG4 = 0x00000006

  TQTBCTR5 = 0x06A76FB5    TQTBCFG5 = 0x03FFFFFF    TQARCFG5 = 0x00000006

  TQTBCTR6 = 0x159B5666    TQTBCFG6 = 0x03FFFFFF    TQARCFG6 = 0x00000006

  TQTBCTR7 = 0x21C76783    TQTBCFG7 = 0x03FFFFFF    TQARCFG7 = 0x00000006

  PTTBC    = 0x3FFFDBF9

Hardware MAC Address Filters

----------------------------

  Unicast Filter

  [00-03]  = 0x00000000 0x00000000 0x00000100 0x00000000

  Special Multicast Filter

  [00-03]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [04-07]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [08-11]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [12-15]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [16-19]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [20-23]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [24-27]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [28-31]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [32-35]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [36-39]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [40-43]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [44-47]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [48-51]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [52-55]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [56-59]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [60-63]  = 0x00000000 0x00000000 0x00000000 0x00000000

  Other Multicast Filter

  [00-03]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [04-07]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [08-11]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [12-15]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [16-19]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [20-23]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [24-27]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [28-31]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [32-35]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [36-39]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [40-43]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [44-47]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [48-51]  = 0x00000000 0x00000000 0x00000000 0x00000100

  [52-55]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [56-59]  = 0x00000000 0x00000000 0x00000000 0x00000000

  [60-63]  = 0x00000000 0x00000000 0x00000000 0x00000000

Software MAC Address Filter (hash:length/addr/mask/hits)

--------------------------------------------------------

  0x000:  0  ffff.ffff.ffff  0000.0000.0000   1311060

  0x047:  0  0007.0e29.1849  0000.0000.0000         0

  0x0C0:  0  0100.0ccc.cccc  0000.0000.0000     22561

  Software filtered frames: 390

  Unicast overflow mode: 0

  Multicast overflow mode: 1

  Promiscuous mode: 0

Rx Rings

--------

  Rx Ring 0                         Rx Ring 1

  - size        = 128              - size        = 0

  - head        = 3                - head        = 0

  - shadow      = 0x457387F8        - shadow      = 0x00000000

  - ring        = 0x0F443C60        - ring        = 0x00000000

  - ring_malloc = 0x3F443C60        - ring_malloc = 0x00000000

  Rx Ring 2                         Rx Ring 3

  - size        = 0                - size        = 0

  - head        = 0                - head        = 0

  - shadow      = 0x00000000        - shadow      = 0x00000000

  - ring        = 0x00000000        - ring        = 0x00000000

  - ring_malloc = 0x00000000        - ring_malloc = 0x00000000

  Rx Ring 4                         Rx Ring 5

  - size        = 0                - size        = 0

  - head        = 0                - head        = 0

  - shadow      = 0x00000000        - shadow      = 0x00000000

  - ring        = 0x00000000        - ring        = 0x00000000

  - ring_malloc = 0x00000000        - ring_malloc = 0x00000000

  Rx Ring 6                         Rx Ring 7

  - size        = 0                - size        = 0

  - head        = 0                - head        = 0

  - shadow      = 0x00000000        - shadow      = 0x00000000

  - ring        = 0x00000000        - ring        = 0x00000000

  - ring_malloc = 0x00000000        - ring_malloc = 0x00000000

Tx Rings

--------

  Tx Ring 0                         Tx Ring 1

  - size        = 128              - size        = 0

  - head        = 19               - head        = 0

  - tail        = 19               - tail        = 0

  - usedtxds    = 0                - usedtxds    = 0

  - framecnt    = 0                - framecnt    = 0

  - shadow      = 0x45738A2C        - shadow      = 0x00000000

  - ring        = 0x0F4444A0        - ring        = 0x00000000

  - ring_malloc = 0x3F4444A0        - ring_malloc = 0x00000000

  Tx Ring 2                         Tx Ring 3

  - size        = 0                - size        = 0

  - head        = 0                - head        = 0

  - tail        = 0                - tail        = 0

  - usedtxds    = 0                - usedtxds    = 0

  - framecnt    = 0                - framecnt    = 0

  - shadow      = 0x00000000        - shadow      = 0x00000000

  - ring        = 0x00000000        - ring        = 0x00000000

  - ring_malloc = 0x00000000        - ring_malloc = 0x00000000

  Tx Ring 4                         Tx Ring 5

  - size        = 0                - size        = 0

  - head        = 0                - head        = 0

  - tail        = 0                - tail        = 0

  - usedtxds    = 0                - usedtxds    = 0

  - framecnt    = 0                - framecnt    = 0

  - shadow      = 0x00000000        - shadow      = 0x00000000

  - ring        = 0x00000000        - ring        = 0x00000000

  - ring_malloc = 0x00000000        - ring_malloc = 0x00000000

  Tx Ring 6                         Tx Ring 7

  - size        = 0                - size        = 0

  - head        = 0                - head        = 0

  - tail        = 0                - tail        = 0

  - usedtxds    = 0                - usedtxds    = 0

  - framecnt    = 0                - framecnt    = 0

  - shadow      = 0x00000000        - shadow      = 0x00000000

  - ring        = 0x00000000        - ring        = 0x00000000

  - ring_malloc = 0x00000000        - ring_malloc = 0x00000000

Port Stopped: N

ALi_Trujillo_61903#

Hall of Fame Super Gold

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Thanks for the output but I think this is not what I was looking for.  You missed the "e" between the word controllers and the interface.

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Hi,

The command do you mention does not exist:

ALi_Trujillo_61903#sh controll

ALi_Trujillo_61903#sh controllers ?

  Async         Async UART internal info

  Async         Async interface

  E1            E1 controller internal state

  FastEthernet  FastEthernet IEEE 802.3

  J1            J1 controller internal state

  Serial        Serial

  T1            T1 controller internal state

  T3            T3 controller internal state

  XTagATM       Extended Tag ATM interface

  vsi           VSI information

  |             Output modifiers

 

ALi_Trujillo_61903#sh controll e fas

ALi_Trujillo_61903#sh controll e ?

% Unrecognized command

ALi_Trujillo_61903#sh controll e1 fas

ALi_Trujillo_61903#sh controll e1 ?

  |  Output modifiers

 

ALi_Trujillo_61903#sh controll e1

ALi_Trujillo_61903#'

Can yu have another command, please?

Attn.

Roger Majo

Hall of Fame Super Gold

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Sorry, but can you run the command on the switch?

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Hi,

I am going to ask for the command to the switch administrator.

Thanking you in advance.

Attn.

Roger Majo

Super Bronze

CONECTION BETWEEN ROUTER 2811 AND SWITCH 3750G SHOWS HIGH ERROR

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

Like Glen, your initial posting stats could indicate the 3750G is sending large bursts of traffic to the 2811 (small packets would be the most problematic).  The 2811, although it has FastEthernet ports, does not guarantee 100 Mbps line-rate.  What you may need to do is slow or pace the transmission rate from the 3750G to the 2811.  Perhaps the simplest change you might try is to run this connection at 10 Mbps.  Or, you can use QoS features on the 3750G to slow its transmission rate to the 2811.

As to whether a router with a gig interface would work better, really depends on the performance of the router itself.  For example, the next larger model in the 2800 series, the 2821, offers gig interfaces but it too, I recall, doesn't even guarantee 100 Mbps line rates either but this kind of drop should decrease as that model is "faster". (BTW, the newer 2900 series are much "faster" for the same model level, i.e. a 2911 is much "faster" than a 2811.)

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