Solved

Cannot get trunk between Cisco 3750 and 3550

Posted on 2013-12-21
3
740 Views
Last Modified: 2013-12-21
I am trying to get a trunk between a 3750G and a 3550 switch.   I have the following port configs, but I cannot ping the 3750 switch from the existing network.   The 3550 is in service and working, and the 3750 is new to the network.   I have tried a crossover cable and a straight cable.  I am on Port 1 on the 3750 and port 3 on the 3550.

What am I missing?

Config on 3750.

no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!

!

!
no aaa new-model
switch 1 provision ws-c3750g-24t
ip subnet-zero
!
cluster enable PAMs_Auto 0
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet1/0/1
 description Connection to Switch 2
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 10
 switchport trunk allowed vlan 1,10,13,110
 switchport mode trunk
 spanning-tree portfast
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan10
 ip address 192.168.2.114 255.255.255.0
!
ip classless
ip http server
!
!
control-plane
!
!
line con 0
line vty 0 4
 password 
 no login
line vty 5 15
 password
 no login
!
end

Open in new window


3550 config
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname PAMs3550_3
!
enable password rr11tt##
!
no aaa new-model
mls qos
ip subnet-zero
!
vtp mode transparent
cluster enable PAMs_Auto 0
!
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
vlan 10
 name Data
!
vlan 13
 name Wireless
!
vlan 110
 name Voice
!
!
interface GigabitEthernet0/3
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 10
 switchport trunk allowed vlan 1,10,13,110
 switchport mode trunk
 duplex full
 spanning-tree portfast
!
interface Vlan1
 no ip address
!
interface Vlan10
 ip address 192.168.2.104 255.255.255.0
!
ip classless
ip http server
ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
line vty 0 4
 password 
 login
line vty 5 15
 password
 login
!
end

Open in new window

0
Comment
Question by:pamsauto
  • 2
3 Comments
 
LVL 31

Accepted Solution

by:
Gareth Gudger earned 500 total points
ID: 39733995
It could be that VLAN10 is not in the VLAN database. From configure terminal, try just typing VLAN10 (no interface before it) and nothing else. Do this on both switches. Then retry your tests.
0
 
LVL 31

Expert Comment

by:Gareth Gudger
ID: 39734000
I do also see that 3550 side you have hard coded the speed/duplex and on the 3750 you have not. This could be causing a problem. I would try hard coding both sides, or,  not at all.
0
 

Author Closing Comment

by:pamsauto
ID: 39734034
Thanks!   That was it.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

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.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
connect 10G with 1G 16 85
DC connectivity – dynamic failover options (BGP, routing over GRE, etc.) 4 45
Cisco RSTP portfast 3 69
access vs trunk with voice vlan 2 44
This tutorial will go through the steps required to write a script that will back up the configuration settings of a HP-ProCurve switch. You will need to get the following things to follow this tutorial: Telnet Scripting Tool e.g. TST10.exe …
I eventually solved a perplexing problem setting up telnet for a new switch.  I installed a new Cisco WS-03560X-24P switch connected to an existing Cisco 4506 running a WS-X4013-10GE Sup II-Plus. After configuring vlans and trunking,  I could no…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question