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cisco 3400 not routing

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cboyd2011
Level 1
Level 1

‎06-26-2011 04:09 AM - edited ‎03-07-2019 12:58 AM

Hello All,

I have a cisco 3400 connected to a Cisco 831

The 831 is online and working fine, also the computers connected to it work fine as well
I connected a Cisco 3400 up to it on fa0/24

the light comes the 831 and 3400 just fine

The 3400 and 831 show each other in the ARP tables but they will not ping each other nor will the 3400 get out the the internet
I included my config file and some commands I ran

Any Ideas?

Thank You very much for ready and any help you can provide

Cisco IOS Software, ME340x Software (ME340x-METROACCESS-M), Version 12.2(25)SEG1
, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Mon 07-Aug-06 19:02 by myl
Image text-base: 0x00003000, data-base: 0x00C0489C

ROM: Bootstrap program is ME340x boot loader
BOOTLDR: ME340x Boot Loader (me340x-HBOOT-M) Version 12.2(25r)EX, RELEASE SOFTWA
RE (fc4)

test uptime is 6 hours, 10 minutes
System returned to ROM by power-on
System image file is "flash:me340x-metroaccess-mz.122-25.SEG1/me340x-metroaccess
-mz.122-25.SEG1.bin"

cisco ME-3400-24TS-A (PowerPC405) processor (revision C0) with 118784K/12280K by
tes of memory.

config:

Current configuration : 1684 bytes

!

version 12.2

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname test

!!

no aaa new-model

ip subnet-zero

!

no file verify auto

!

spanning-tree mode rapid-pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

vlan 250

name MGT

!

interface FastEthernet0/1

shutdown

!

interface FastEthernet0/2

shutdown

!

interface FastEthernet0/3

shutdown

!

interface FastEthernet0/4

shutdown

!

interface FastEthernet0/5

shutdown

!

interface FastEthernet0/6

shutdown

!

interface FastEthernet0/7

shutdown

!

interface FastEthernet0/8

shutdown

!

interface FastEthernet0/9

shutdown

!

interface FastEthernet0/10

shutdown

!

interface FastEthernet0/11

shutdown

!

interface FastEthernet0/12

shutdown

!

interface FastEthernet0/13

shutdown

!

interface FastEthernet0/14

shutdown

!

interface FastEthernet0/15

shutdown

!

interface FastEthernet0/16

shutdown

!

interface FastEthernet0/17

shutdown

!

interface FastEthernet0/18

shutdown

!

interface FastEthernet0/19

shutdown

!

interface FastEthernet0/20

shutdown

!

interface FastEthernet0/21

shutdown

interface FastEthernet0/22

shutdown

!

interface FastEthernet0/23

shutdown

!

interface FastEthernet0/24

speed 100

duplex full

!

interface GigabitEthernet0/1

port-type nni

!

interface GigabitEthernet0/2

port-type nni

!

interface Vlan1

ip address dhcp

no ip route-cache

!

ip default-gateway 192.168.4.1

no ip http server

!

line con 0

line vty 0 4

password TEST

no login

length 0

line vty 5 15

password TEST

no login

length 0

!

end

test#sh int vlan1

Vlan1 is up, line protocol is up
  Hardware is EtherSVI, address is 001c.b18f.cac0 (bia 001c.b18f.cac0)
  Internet address is 192.168.4.22/24  <<<<<<<<<<<<<<-------------------------------------------
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:17:25, output 00:34:03, 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 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     596 packets input, 56255 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     91 packets output, 9931 bytes, 0 underruns
     0 output errors, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out

test#sh arp

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  127.0.0.20              -   001c.b18f.ca80  SNAP   Virtual1

Internet  192.168.4.1            37   0011.216f.af11  ARPA   Vlan1

Internet  192.168.4.22            -   001c.b18f.cac0  ARPA   Vlan1

test#ping 4.2.2.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.2.2.1, timeout is 2 seconds:

06:15:29: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending
06:15:29: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending full p
acket.
06:15:31: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending
06:15:31: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending full p
acket.
06:15:33: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending
06:15:33: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending full p
acket.
06:15:35: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending
06:15:35: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending full p
acket.
06:15:37: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending
06:15:37: IP: s=192.168.4.22 (local), d=4.2.2.1 (Vlan1), len 100, sending full p
acket.
Success rate is 0 percent (0/5)

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41 Replies 41

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rsimoni
Cisco Employee
Cisco Employee
In response to cboyd2011

‎07-05-2011 02:45 AM

Hi Christopher,

you need to have a metroipaccess image to enable ip routing on the me3400; you have a metro access one instead >

Cisco IOS Software, ME340x Software (ME340x-METROACCESS-M), Version 12.2(25)SEG1

Please rate the answer/flag the question as answered if this helps.

Riccardo

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cboyd2011
Level 1
Level 1
In response to rsimoni

‎07-05-2011 02:49 AM

Riccardo,

Thanks for your post
I had a feeling that was why, that's why I wanted to update it
The problem with that is, the switch will not route anything so I have to way of updating the IOS unless I can do it over the console somehow

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cadet alain
VIP Alumni
VIP Alumni
In response to cboyd2011

‎07-05-2011 03:02 AM

Hi,

effectively I had overlooked the image version you had, sorry for that.

But did you try connecting simply a pc in same subnet to one interface and no shut it and then try to communicate with the switch via its interface vlan 1 ? if so you could transfer ios on this pc by connecting to router and then copy it to switch via tftp or ftp.

Regards.

Alain.

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cboyd2011
Level 1
Level 1
In response to cadet alain

‎07-05-2011 03:43 AM

I just tried it

Connected my laptop directly to port fa0/23

interface FastEthernet0/23

!

nterface Vlan1

ip address 192.168.4.120 255.255.255.0

no ip route-cache

!

ip default-gateway 192.168.4.1

no ip http server

configured on laptop ip 192.168.4.100 su 255.255.255.0 ga 192.168.4.1

getting timeout when ping 192.168.4.120

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cboyd2011
Level 1
Level 1
In response to cboyd2011

‎07-05-2011 03:53 AM

I opened Wireshark with it connected like this

I see 2 ICMP Echo ping request, then I see 1 Loop Reply

does this 3 times then I see: ARP Who has 192.168.4.120? Tell 192.168.4.100

followed with: ARP 192.168.4.120 is at 00:1c:b1:8f:ca:c0 which is the Mac id on vlan1

Hope this helps!

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cadet alain
VIP Alumni
VIP Alumni
In response to cboyd2011

‎07-05-2011 04:29 AM

So you finally got a successful ping?

your pc( 192.168.4.100 ) got the arp reply from the switch and so populated its arp cache which you can verify with arp -a in a command prompt window.But for the communication to take place the other part must also have the other mac address mapping so on the switch the show arp should mention the mac address of your pc along with its ip address and it is kept by default for 1440 mins in the cache so as time goes by the number in front should increase.

If you've got those 2 arp caches populated then if your firewall on pc is not blocking icmp echo-requests you should get icmp echo-replies back and the ping should be successful. All this should be confirmed with wireshark output.

On your switch you should also see the mac address of your pc linked to port f0/23 in vlan 1 in the CAM table( output of show mac address-table dynamic vlan 1).

Regards.

Alain.

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cboyd2011
Level 1
Level 1
In response to cadet alain

‎07-05-2011 04:49 AM

No didn't get a successful ping, just timeouts

arp -a

Interface: 192.168.4.100 --- 0xb

Internet address         Physical Address     Type

192.168.4.120           00-1c-b1-8f-ca-c0     dynamic

192.168.4.255           ff-ff-ff-ff-ff-ff                static

test#sh arp

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.4.120           -   001c.b18f.cac0  ARPA   Vlan1

test#show mac address-table dynamic vlan 1
          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports
----    -----------       --------    -----

test#show mac address-table static vlan 1
          Mac Address Table
-------------------------------------------

Vlan    Mac Address       Type        Ports
----    -----------       --------    -----
All    0100.0ccc.cccc    STATIC      CPU
All    0100.0ccc.cccd    STATIC      CPU
All    0180.c200.0000    STATIC      CPU
All    0180.c200.0001    STATIC      CPU
All    0180.c200.0002    STATIC      CPU
All    0180.c200.0003    STATIC      CPU
All    0180.c200.0004    STATIC      CPU
All    0180.c200.0005    STATIC      CPU
All    0180.c200.0006    STATIC      CPU
All    0180.c200.0007    STATIC      CPU
All    0180.c200.0008    STATIC      CPU
All    0180.c200.0009    STATIC      CPU
All    0180.c200.000a    STATIC      CPU
All    0180.c200.000b    STATIC      CPU
All    0180.c200.000c    STATIC      CPU
All    0180.c200.000d    STATIC      CPU
All    0180.c200.000e    STATIC      CPU
All    0180.c200.000f    STATIC      CPU
All    0180.c200.0010    STATIC      CPU
All    ffff.ffff.ffff    STATIC      CPU
Total Mac Addresses for this criterion: 20

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cadet alain
VIP Alumni
VIP Alumni
In response to cboyd2011

‎07-05-2011 06:19 AM

ok,

the lack of any dynamic entries in the CAM table is due to the default aging of 5 mins.

the arp cache in the switch should have at least one incomplete entry for the host mac address if arp failed but there is no entry( maybe they are flushed more quickly than dynamic which stay for 1440 mins by default).

clear your host arp cache with the arp -d * command then while sniffing your interface just ping the switch vlan 1 ip address and post wireshark pcap file as well as the previous commands and also the output of debug arp on the switch.

Regards.

Alain.

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majed.balsharaf
Level 1
Level 1

‎07-05-2011 12:59 PM

Hi Christopher

   3400 switch is a Metro Ethernet switch.and by default all the ports are in uni mode,except 2 uplinks which are in nni. Uni means user network interface and it is isolated. nni is network node interface. NNI is used to connected to routers or another switch.

we can make 4 ports as nni.

by default on every cisco switch all the ports are in nni. but metro Switches like 34xx and 24xx are uni ports.

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cadet alain
VIP Alumni
VIP Alumni
In response to majed.balsharaf

‎07-05-2011 02:57 PM

Hi Majed,

This explains this weird behaviour i couldn't understand the reason why.I had never used such a switch model but it will at least teach me something which is when you don't know a product get informed about it before trying to help others fighting against a situation I don't know more about than them.

Regards.

Alain.

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cboyd2011
Level 1
Level 1
In response to cadet alain

‎07-06-2011 12:03 AM

THANK YOU THANK YOU THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

IT WORKED

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majed.balsharaf
Level 1
Level 1
In response to cadet alain

‎07-07-2011 04:10 AM

Hi cadet alain,

   Metro switches are used specially for VOIP ;-)

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