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Cisco Catalyst 2950

Posted on 2009-07-14
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Last Modified: 2012-05-07
I am new to Cisco and I have an issue that I needed help with. The Switch is a 48 port with 2 fiber uplinks. I have this switch trunked to another 2950 same switch on the 0/1 fiber port. The port is green and the link is up until I plug in an Ethernet cable into any of the other 48 ports. This might be a simple questions but I am not sure how to resolve it, thanks!
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Question by:sierrawolf
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7 Comments
 
LVL 34

Expert Comment

by:Istvan Kalmar
ID: 24852618
colud you show me the following:

show int status
show run
show spannig-tree
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Author Comment

by:sierrawolf
ID: 24852660
One other thing, I do not have a router in place, I have a Catalyst 6500 but at this time the network is a loop of about 12 Netgear Layer 2 switches being replaced with these Cisco switches.

 
User Access Verification
 
Password:
ITSERVERROOM>enable
Password:
ITSERVERROOM#show int status
 
Port      Name               Status       Vlan       Duplex  Speed Type
Fa0/1     Normal User        connected    1          a-full  a-100 10/100BaseTX
Fa0/2     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/3     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/4     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/5     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/6     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/7     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/8     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/9     Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/10    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/11    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/12    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/13    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/14    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/15    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/16    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/17    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/18    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/19    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/20    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/21    Normal User        notconnect   1            auto   auto 10/100BaseTX
 
Port      Name               Status       Vlan       Duplex  Speed Type
Fa0/22    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/23    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/24    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/25    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/26    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/27    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/28    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/29    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/30    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/31    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/32    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/33    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/34    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/35    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/36    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/37    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/38    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/39    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/40    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/41    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/42    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/43    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/44    Normal User        notconnect   1            auto   auto 10/100BaseTX
 
Port      Name               Status       Vlan       Duplex  Speed Type
Fa0/45    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/46    Normal User        notconnect   1            auto   auto 10/100BaseTX
Fa0/47    Upstream or peer s notconnect   1            auto   auto 10/100BaseTX
Fa0/48    Upstream or peer s notconnect   1            auto   auto 10/100BaseTX
Gi0/1                        notconnect   1            auto   auto 1000BaseSX
Gi0/2     Upstream or peer s notconnect   1            auto   auto 1000BaseSX
ITSERVERROOM#show run
Building configuration...
 
Current configuration : 5006 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname ITSERVERROOM
!
enable secret 5 $1$aW8T$.mP0l9qDweiXYGBnYAjtw0
enable password c@lnev@
!
wrr-queue bandwidth 10 20 70 1
wrr-queue cos-map 1 0 1
wrr-queue cos-map 2 2 4
wrr-queue cos-map 3 3 6 7
wrr-queue cos-map 4 5
mls qos map cos-dscp 0 8 16 24 32 46 48 56
ip subnet-zero
!
ip ssh time-out 120
ip ssh authentication-retries 3
cluster enable CalNevaSwitchCluster 0
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
!
!
!
interface FastEthernet0/1
 description Normal User
 switchport mode access
!
interface FastEthernet0/2
 description Normal User
 switchport mode access
!
interface FastEthernet0/3
 description Normal User
 switchport mode access
!
interface FastEthernet0/4
 description Normal User
 switchport mode access
!
interface FastEthernet0/5
 description Normal User
 switchport mode access
!
interface FastEthernet0/6
 description Normal User
 switchport mode access
!
interface FastEthernet0/7
 description Normal User
 switchport mode access
!
interface FastEthernet0/8
 description Normal User
 switchport mode access
!
interface FastEthernet0/9
 description Normal User
 switchport mode access
!
interface FastEthernet0/10
 description Normal User
 switchport mode access
!
interface FastEthernet0/11
 description Normal User
 switchport mode access
!
interface FastEthernet0/12
 description Normal User
 switchport mode access
!
interface FastEthernet0/13
 description Normal User
 switchport mode access
!
interface FastEthernet0/14
 description Normal User
 switchport mode access
!
interface FastEthernet0/15
 description Normal User
 switchport mode access
!
interface FastEthernet0/16
 description Normal User
 switchport mode access
!
interface FastEthernet0/17
 description Normal User
 switchport mode access
!
interface FastEthernet0/18
 description Normal User
 switchport mode access
!
interface FastEthernet0/19
 description Normal User
 switchport mode access
!
interface FastEthernet0/20
 description Normal User
 switchport mode access
!
interface FastEthernet0/21
 description Normal User
 switchport mode access
!
interface FastEthernet0/22
 description Normal User
 switchport mode access
!
interface FastEthernet0/23
 description Normal User
 switchport mode access
!
interface FastEthernet0/24
 description Normal User
 switchport mode access
!
interface FastEthernet0/25
 description Normal User
 switchport mode access
!
interface FastEthernet0/26
 description Normal User
 switchport mode access
!
interface FastEthernet0/27
 description Normal User
 switchport mode access
!
interface FastEthernet0/28
 description Normal User
 switchport mode access
!
interface FastEthernet0/29
 description Normal User
 switchport mode access
!
interface FastEthernet0/30
 description Normal User
 switchport mode access
!
interface FastEthernet0/31
 description Normal User
 switchport mode access
!
interface FastEthernet0/32
 description Normal User
 switchport mode access
!
interface FastEthernet0/33
 description Normal User
 switchport mode access
!
interface FastEthernet0/34
 description Normal User
 switchport mode access
!
interface FastEthernet0/35
 description Normal User
 switchport mode access
!
interface FastEthernet0/36
 description Normal User
 switchport mode access
!
interface FastEthernet0/37
 description Normal User
 switchport mode access
!
interface FastEthernet0/38
 description Normal User
 switchport mode access
!
interface FastEthernet0/39
 description Normal User
 switchport mode access
!
interface FastEthernet0/40
 description Normal User
 switchport mode access
!
interface FastEthernet0/41
 description Normal User
 switchport mode access
!
interface FastEthernet0/42
 description Normal User
 switchport mode access
!
interface FastEthernet0/43
 description Normal User
 switchport mode access
!
interface FastEthernet0/44
 description Normal User
 switchport mode access
!
interface FastEthernet0/45
 description Normal User
 switchport mode access
!
interface FastEthernet0/46
 description Normal User
 switchport mode access
!
interface FastEthernet0/47
 description Upstream or peer switch
 switchport mode trunk
!
interface FastEthernet0/48
 description Upstream or peer switch
 switchport mode trunk
!
interface GigabitEthernet0/1
 switchport mode trunk
 switchport nonegotiate
 mls qos trust cos
 auto qos voip trust
 macro description cisco-switch
 spanning-tree link-type point-to-point
!
interface GigabitEthernet0/2
 description Upstream or peer s
!
interface Vlan1
 ip address 192.168.1.38 255.255.128.0
 no ip route-cache
!
ip http server
!
ip access-list extended CMP-NAT-ACL
 dynamic Cluster-HSRP deny   ip any any
 dynamic Cluster-NAT permit ip any any
snmp-server community 192.168.1.38 RO
snmp-server community 192.168.1.38@es0 RO
!
line con 0
line vty 0 4
 password c@lnev@
 login
line vty 5 15
 password c@lnev@
 login
!
!
end
 
ITSERVERROOM#show spanning-treee
                               ^
% Invalid input detected at '^' marker.
 
ITSERVERROOM#show spanning-tree
 
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    32768
             Address     0004.2847.2800
             Cost        23
             Port        1 (FastEthernet0/1)
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
 
  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     0015.f941.8cc0
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 15
 
Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Root FWD 19        128.1    P2p
 
ITSERVERROOM#

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LVL 34

Expert Comment

by:Istvan Kalmar
ID: 24853351
what did you connected via fastethernet, when the optical link went down?
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Author Comment

by:sierrawolf
ID: 24853487
Whenever I connect any patch cable CAT5 CAT6 to any port it goes down, I tried different cables just in case but that had no affect either.
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LVL 1

Expert Comment

by:wsenter
ID: 24856440
Is that the same config for both 2950's ? If so, there is a known problem using auto / auto for both duplex and speed at both ends of a circuit. In this case the Gi0/1 ports. Try changing the duplex to full and the speed to 1000 for these ports on both switches.

Also, what type of device are you plugging into the switch?
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Accepted Solution

by:
Istvan Kalmar earned 50 total points
ID: 24856472
please refer me the log files on booth sides
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Author Comment

by:sierrawolf
ID: 24869825
Bothe of the configs are the same on both 2950's. The other 2950 only has the one fiber port in use, the other 48 ports are empty just like this one, but when I patch to another switch is when the link goes down. I tried moving the fiber port from the Cisco to a Netgear Layer 2 switch and it works with that switch? Is there any way that this Cisco is just bad?
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Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

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