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

ROGER FERNANDO MAJO ZACARIAS · ‎04-12-2012

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#

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

Joseph W. Doherty · ‎04-18-2012

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.)

View solution in original post

glen.grant · ‎04-12-2012

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 .

Leo Laohoo · ‎04-12-2012

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

ROGER FERNANDO MAJO ZACARIAS · ‎04-16-2012

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#

Leo Laohoo · ‎04-16-2012

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.

ROGER FERNANDO MAJO ZACARIAS · ‎04-17-2012

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

Leo Laohoo · ‎04-17-2012

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

ROGER FERNANDO MAJO ZACARIAS · ‎04-18-2012

Hi,

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

Thanking you in advance.

Attn.

Roger Majo

Joseph W. Doherty · ‎04-18-2012

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.)