asked on

Cisco Switch can't ping anything

I configured this Cisco 2950 switch. It's in production. I have our servers connected to the switch. I can the servers with no problems.

However, I can not ping the switch (192.168.1.101) itself. I can't telnet into the switch. I have to hyperterm into it.

When I do hyperterm into the switch, I can not ping anything from the switch.

How can I make this switch pingable? How can I telnet into this switch?
Any help would be appreciated.
Thanks

EQUIPMENT:
Model number: WS-C2950-24
C2950 Software (C2950-I6Q4L2-M), Version 12.1(9)EA1

sh run
Building configuration...

Current configuration : 1977 bytes
!
! Last configuration change at 08:45:02 EST Wed Mar 9 2011
! NVRAM config last updated at 16:04:12 EST Tue Mar 8 2011
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Cisco2950
!
enable secret 5 $1$0x999X$XXX.XXXXXXXXXXXXX
enable password expertexchange
!
clock timezone EST -5
ip subnet-zero
!
spanning-tree portfast default
spanning-tree extend system-id
!
!
interface FastEthernet0/1
 switchport mode access
 no ip address
!
interface FastEthernet0/2
 no ip address
!
interface FastEthernet0/3
 no ip address
!
interface FastEthernet0/4
 no ip address
!
interface FastEthernet0/5
 no ip address
 duplex full
 speed 100
!
interface FastEthernet0/6
 no ip address
!
interface FastEthernet0/7
no ip address
!
interface FastEthernet0/8
 no ip address
!
interface FastEthernet0/9
 no ip address
!
interface FastEthernet0/10
 no ip address
!
interface FastEthernet0/11
 no ip address
!
interface FastEthernet0/12
 no ip address
!
interface FastEthernet0/13
 no ip address
!
interface FastEthernet0/14
 no ip address
!
interface FastEthernet0/15
 no ip address
!
interface FastEthernet0/16
 no ip address
!
interface FastEthernet0/17
 no ip address
!
interface FastEthernet0/18
 no ip address
!
interface FastEthernet0/19
 no ip address
!
interface FastEthernet0/20
 no ip address
!
interface FastEthernet0/21
 no ip address
!
interface FastEthernet0/22
 no ip address
!
interface FastEthernet0/23
 switchport mode trunk
 no ip address
!
interface FastEthernet0/24
 switchport mode trunk
 no ip address
!
interface Vlan1
 ip address 192.168.1.101 255.255.255.0
 no ip route-cache
!
interface Vlan10
 ip address 10.0.1.10 255.255.255.0
 no ip route-cache
 shutdown
!
ip default-gateway 192.168.1.10
ip http server
!
!
line con 0
 exec-timeout 0 0
 logging synchronous
line vty 0 4
 exec-timeout 60 0
 password 7 0346790FFFFB234F68
 login
line vty 5 15
 password 7 0346790FFFFB234F68
 login
!
end

Cisco2950#

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Istvan Kalmar

Hi,

the config seems to good.,... you able to ping all address on 192.168.1.0/24 subnet!

Best regards,
Istvan

Member_2_957366

There might be an ICMP restrict on your router so please check the access list on router and make sure that the router allows this.

Istvan Kalmar

Please show us:

sh vlan
sh ip int brief

Marius Gunnerud

Where are the client machines located? Does the router with ip 192.168.1.10 have routes to the 10.0.1.0 network?

greatbay

ASKER

From the Switch, I can't ping anything, except itself (192.168.1.101). I can't even ping the default gateway.

I'm not using any access-list on any of our routers.

I also tried changing the switch IP from 101 to 132. Nothing.

DColclazier

Any chance you're having an IP conflict? Seems odd to IP a switch that high in the range...

greatbay

ASKER

sh vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/1, Fa0/2, Fa0/3, Fa0/4
Fa0/5, Fa0/6, Fa0/7, Fa0/8
Fa0/9, Fa0/10, Fa0/11, Fa0/12
Fa0/13, Fa0/14, Fa0/15, Fa0/16
Fa0/17, Fa0/18, Fa0/19, Fa0/20
Fa0/21, Fa0/22, Fa0/23
2 VLAN0002 active
10 VLAN0010 active
11 Voice-Largo active
104 Guest-Network active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
2 enet 100002 1500 - - - - - 0 0
10 enet 100010 1500 - - - - - 0 0
11 enet 100011 1500 - - - - - 0 0
104 enet 100104 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0

Cisco2950#sh int ip int brief
Interface IP-Address OK? Method Status Protocol
Vlan1 192.168.1.101 YES manual up up
Vlan10 10.0.1.10 YES NVRAM administratively down down
FastEthernet0/1 unassigned YES unset up up
FastEthernet0/2 unassigned YES unset up up
FastEthernet0/3 unassigned YES unset up up
FastEthernet0/4 unassigned YES unset up up
FastEthernet0/5 unassigned YES unset up up
FastEthernet0/6 unassigned YES unset up up
FastEthernet0/7 unassigned YES unset up up
FastEthernet0/8 unassigned YES unset up up
FastEthernet0/9 unassigned YES unset up up
FastEthernet0/10 unassigned YES unset up up
FastEthernet0/11 unassigned YES unset up up
FastEthernet0/12 unassigned YES unset up up
FastEthernet0/13 unassigned YES unset up up
FastEthernet0/14 unassigned YES unset down down
FastEthernet0/15 unassigned YES unset up up
FastEthernet0/16 unassigned YES unset up up
FastEthernet0/17 unassigned YES unset up up
FastEthernet0/18 unassigned YES unset up up
FastEthernet0/19 unassigned YES unset up up
FastEthernet0/20 unassigned YES unset down down
FastEthernet0/21 unassigned YES unset down down
FastEthernet0/22 unassigned YES unset up up
FastEthernet0/23 unassigned YES unset down down
FastEthernet0/24 unassigned YES unset up up

Cisco2950#sh int trunk

Port Mode Encapsulation Status Native vlan
Fa0/24 on 802.1q trunking 1

Port Vlans allowed on trunk
Fa0/24 1-4094

Port Vlans allowed and active in management domain
Fa0/24 1-2,10-11,104

Port Vlans in spanning tree forwarding state and not pruned
Fa0/24 1-2,10-11,104
Cisco2950#

Member_2_957366

You must have a firewall somewhere between your switch and the next hop. Check the firewall for ICMP restrictions.

Can you trace the traffic and see where the traffic stops?

greatbay

ASKER

I have (3) cisco 2900 series switches. The other two switches are fine.
Cisco 2950 (192.168.1.239)
Cisco 2900 (192.168.1.93)
No problems with these switches.

Cisco 2950 (192.168.1.101). I can't telnet into this switch.

greatbay

ASKER

I checked the firewall, no ping restrictions.

Member_2_957366

Have you turned on the telnet session on the switch?

If not, please use this command:

>line vty 0 15
>password whateveryouchose
>login yourchoice

Istvan Kalmar

please show us:

sh line

greatbay

ASKER

I did the following:
TELNET SETUP
config t
line vty 0 4
exec-timeout 60 0
login
password cisco

It didn't work. I still can not telnet in to the switch, let alone ping this switch.

greatbay

ASKER

Cisco2950#sh line
Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
* 0 CTY - - - - - 0 0 0/0 -
1 VTY - - - - - 3 0 0/0 -
2 VTY - - - - - 0 0 0/0 -
3 VTY - - - - - 0 0 0/0 -
4 VTY - - - - - 0 0 0/0 -
5 VTY - - - - - 0 0 0/0 -
6 VTY - - - - - 0 0 0/0 -
7 VTY - - - - - 0 0 0/0 -
8 VTY - - - - - 0 0 0/0 -
9 VTY - - - - - 0 0 0/0 -
10 VTY - - - - - 0 0 0/0 -
11 VTY - - - - - 0 0 0/0 -
12 VTY - - - - - 0 0 0/0 -
13 VTY - - - - - 0 0 0/0 -
14 VTY - - - - - 0 0 0/0 -
15 VTY - - - - - 0 0 0/0 -
16 VTY - - - - - 0 0 0/0 -

Cisco2950#

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Istvan Kalmar

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greatbay

ASKER

I'll re-booted the switch at 5:00pm this evening.

Istvan Kalmar

greatbay

ASKER

Just to let you know I don't have any serial connections on this switch. However, I'll re-booted the switch at 5:00pm this evening.

Istvan Kalmar

how can you reach the switch at this time?:)

greatbay

ASKER

I'm currently going through the console (hyper-terminal). Later on, I'm just going to power cycle the switch.

Istvan Kalmar

Craig Beck

Do you get anything from:

show cdp neighbours

greatbay

ASKER

Cisco2950#show cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID
Cisco3550 Fas 0/24 159 R S I Cisco WS-CFas 0/5
Cisco2950#

Cisco2950#ping 192.168.1.10
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.10, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

Cisco2950#ping 192.168.1.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.6, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Cisco2950#
==--==
The Cisco3550 (192.168.1.6) is our core switch. The Cisco2950 (192.168.1.101) is plugged into port-5.
The Router (192.168.1.10) is our main router.

Craig Beck

ok what about:

show ip arp

on the 2950?

greatbay

ASKER

Cisco2950#show ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.1.101 - 000a.f43e.5dc0 ARPA Vlan1
Cisco2950#
==--=====--==
That's it.

greatbay

ASKER

IT WORKING!!!!

a cold re-boot fixed it.

I unplugged the switch for a second, then plugged it back in. It came back up in 20 seconds. I'm able to ping the Cisco2950 switch (192.168.1.101).

Sometime in the future, I'm gong to upgrade the firmware
==--=====--==
Cisco2950#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(9)EA1, RELEASE SOFTWARE (
fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Wed 24-Apr-02 06:57 by antonino
Image text-base: 0x80010000, data-base: 0x804E8000

ROM: Bootstrap program is CALHOUN boot loader

Cisco2950 uptime is 7 minutes
System returned to ROM by power-on
System image file is "flash:/c2950-i6q4l2-mz.121-9.EA1.bin"

cisco WS-C2950-24 (RC32300) processor (revision F0) with 20815K bytes of memory.

Processor board ID FHK0636W1CR
Last reset from system-reset
Running Standard Image
24 FastEthernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:0A:F4:3E:5D:C0
Motherboard assembly number: 73-5781-11
Power supply part number: 34-0965-01
Motherboard serial number: FOC06360DKM
Power supply serial number: PHI0631091J
Model revision number: F0
Motherboard revision number: A0
Model number: WS-C2950-24
System serial number: FHK0636W1CR
Configuration register is 0xF

Cisco2950#
==--=====--==
Up grade to Version 12.1(22)EA1

Anyways, thanks for all your help.

greatbay

ASKER

A simple re-boot of the switch was needed. That's it.