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)
Solved! Go to Solution.
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
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
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.
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
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!
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.
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
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.
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.
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.
07-06-2011 12:03 AM
THANK YOU THANK YOU THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
IT WORKED
07-07-2011 04:10 AM
Hi cadet alain,
Metro switches are used specially for VOIP ;-)
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