Re: Cisco Switch issue....I'm new to Cisco and so I need a little help with setup a trunk

andyferguson1977 · ‎07-06-2018

So I did configure 2 switches for trunking but they are unable to ping each other. Please help. Not sure what I'm doing wrong.

Switch 1 - Configuration

Switch#show run
Building configuration...

Current configuration : 1646 bytes
!
version 12.1
no service single-slot-reload-enable
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
enable password cisco
!
ip subnet-zero
!
spanning-tree extend system-id
!
!
interface FastEthernet0/1
switchport trunk allowed vlan 1-100
switchport mode trunk
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
!
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 access vlan 50
switchport mode access
no ip address
!
interface FastEthernet0/24
no ip address
!
interface GigabitEthernet0/1
no ip address
!
interface GigabitEthernet0/2
no ip address
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
ip http server
!
!
line con 0
line vty 0 4
login
line vty 5 15
login
!
end

Switch 2 - Configuration

Switch#show run
Building configuration...

Current configuration:
!
version 12.0
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
enable secret 5 $1$5Aku$zFReGOOhdtOg9V1nU8PKQ/
!
!
!
!
!
!
ip subnet-zero
!
!
!
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1-100,1002-1005
switchport mode trunk
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
switchport access vlan 50
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface FastEthernet0/25
!
interface FastEthernet0/26
!
interface FastEthernet0/27
!
interface FastEthernet0/28
!
interface FastEthernet0/29
!
interface FastEthernet0/30
!
interface FastEthernet0/31
switchport access vlan 100
!
interface FastEthernet0/32
!
interface FastEthernet0/33
!
interface FastEthernet0/34
!
interface FastEthernet0/35
!
interface FastEthernet0/36
!
interface FastEthernet0/37
!
interface FastEthernet0/38
!
interface FastEthernet0/39
!
interface FastEthernet0/40
!
interface FastEthernet0/41
!
interface FastEthernet0/42
!
interface FastEthernet0/43
!
interface FastEthernet0/44
!
interface FastEthernet0/45
!
interface FastEthernet0/46
!
interface FastEthernet0/47
!
interface FastEthernet0/48
switchport access vlan 99
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface VLAN1
no ip directed-broadcast
no ip route-cache
!
!
line con 0
transport input none
stopbits 1
line vty 0 4
login
line vty 5 15
login
!
end

Switch#

marce1000 · ‎07-06-2018

- Wether the designated interfaces have become trunk links can be verified with 'show interface status' ; but ping is unrelated to trunking. Usually you will give every switch an IP address on it's management interface, hence resulting in reachability trough ping.

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

Abhishek Das · ‎07-06-2018

Which IP are you trying to ping? You need to configure IP address for VLAN1 on both switches then only you can ping.

Thanks,

Abhishek

andyferguson1977 · ‎07-06-2018

I was trying to ping the IP of the computers.

Ping from PC1 with IP 192.68.100.100 to PC2 with IP 192.168.50.50 but it didn't ping - Transmit failed, general failure.

michael.burke · ‎07-06-2018

In the config's posted neither switch has an IP address or a default gateway. Create a vlan (layer 2) Create an SVI of the same vlan and assign an Ip to it. Then create a default gateway if you want to ping anything off of the subnet used for the vlan's. I assume there is a router somewhere?

Oh and be sure the SVI (Layer 3 vlan interface) is no shut.

andyferguson1977 · ‎07-06-2018

No router, just testing switch to switch

michael.burke · ‎07-06-2018

These two computers may be in different subnets depending on the subnet mask configured on them.

If you put both computers in the same network they should be able to ping each other. I'm hoping it's just a typo on PC1 but try this

PC1

192.168.100.101

255.255.255.0

GW 192.168.100.1

PC2

192.168.100.102

255.255.255.0

GW 192.168.100.1

If these two pc's are connected to interfaces configured for switchport access vlan 100 on each switch and the trunk allows vlan 100 then you may be in business.

andyferguson1977 · ‎07-06-2018

Awesome

I can ping..........YESSSSS

Now, how can I ping from 192.168.100.100 to IP 192.168.50.50

What if I have multiple networks and need them to access the same printers and the same file server

marce1000 · ‎07-06-2018

- Beyond the scope of the forum but in the domain of study-and-learn....

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

michael.burke · ‎07-06-2018

You need a routed interface for each network, ie layer 3 or IP. You will need to enable the SDM routing template and ip routing. I think this thread and the link at the bottom of it has what you're looking for but it is based off of 2960's.

If you want to learn more networking make sure to have a solid understanding of Layer 2 vs Layer 3. What we made work was just a Layer 2 connection.

https://supportforums.cisco.com/t5/getting-started-with-lans/can-two-switches-pass-different-vlan-traffic-between-each-other/td-p/2505755

AymanMunassar · ‎07-08-2018

First, check the ports on the switch that you used to link it to the computer are on the same VLAN.

For example: computer A ---- Switch ----- Switch ----- computer B

Both A and B ports on the switch must be on the same VLAN.

Second: check that you have created the VLAN of question on all the switches.

Third: Make sure that the trunk links are allowed to transfer the VLAN in question.

Yours scinerely.

AymanMunassar · ‎07-09-2018

Actually, you cannot ping between switches because they work in layer 2. Layer 3 switches are exceptional. So, if you want to check your work, link two computers into your switches in question and then give each computer an ip from the same mask. Finally. use the ping.

Martin Carr · ‎07-09-2018

No you can, assuming you have created an SVI.

The switch would also contain an ARP table.

Martin

AymanMunassar · ‎07-09-2018

I am talking apart from L3 switches. Look at his output, he does not have any SVI.

Martin Carr · ‎07-09-2018

I see what your saying, originally it read as you need a L3 switch to ping another node.