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Apsarok
Beginner

Cannot connect to another VLan using static IP address, also no internet

Hello guys, I am new to Cisco. Please help me.

 

1. I have a Cisco Core Switch: Vlan 1: 199.164.42.1,  Vlan 14: 172.25.48.1

 

2. Then, I have a switch 199.164.42.9 with the following:

Port 5 is mainly used for manually configured devices on Vlan14.

Port 7 is a test port.

 

3. Using my laptop through Port 7 I am able to connect by using a static IP address:

IP: 199.164.42.200

Subnet: 255.255.255.0

Default Gateway: 199.164.42.1

DNS: 199.164.42.14

DNS: 8.8.8.8

 

4. Using the same config on my laptop I am not able to connect through Port 5.

 

Also please check ports mode:

 p5.PNGp7.PNG

I cannot understand why. Thank you very much!

11 REPLIES 11
Apsarok
Beginner

What I tried so far on interface 0/5.

 

I checked: 

Port Vlans allowed on trunk
Gi0/5 14,100

 

Then I added Vlan1 to Interface 5

(config-if)#switchport trunk allowed vlan add 1

 

Result: 

Port Vlans allowed and active in management domain
Gi0/5 1,14,100

 

ISSUE: Still cannot connect to the port with manual IP address:

199.164.42.x

255.255.255.0

199.164.42.1

DNS:

199.164.42.14

8.8.8.8

 

I cannot even ping 199.164.42.14

 

Apsarok
Beginner

show interface trunk

 

Port Mode Encapsulation Status Native vlan
Gi0/5 on 802.1q trunking 14
Gi0/13 on 802.1q trunking 1
Gi0/17 auto 802.1q trunking 1

 

Port Vlans allowed on trunk
Gi0/5 1,14,100
Gi0/13 1-4094
Gi0/17 1-4094
Gi0/21 1-4094
Gi0/23 1-4094
Gi0/24 1,16,100
Gi0/25 1-4094

Port Vlans allowed and active in management domain
Gi0/5 1,14,100
Gi0/13 1,7,11-12,14-16,21-22,80,100
Gi0/17 1,7,11-12,14-16,21-22,80,100

 


Port Vlans in spanning tree forwarding state and not pruned
Gi0/5 1,14,100
Gi0/13 1,7,11-12,14-16,21-22,80,100
Gi0/17 1,7,11-12,14-16,21-22,80,100
Gi0/21 1,7,11-12,14-16,21-22,80,100
Gi0/23 1,7,11-12,14-16,21-22,80,100
Gi0/24 1,16,100
Gi0/25 1,7,11-12,14-16,21-22,80,100

 

 

Also I saw that VLAN1 is not tagget to port Gi0/5, tried to add with with switchport access vlan 1. Didnt work.
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi0/8, Gi0/9, Gi0/10, Gi0/11
Gi0/12, Gi0/14, Gi0/18, Gi0/19
Gi0/20, Gi0/22
7 Plant active

Apsarok
Beginner

After I understood the issue, I was able finally to add the Vlan 1 to port Gi0/5

By using following commands:

 

#configure

#interface range gi0/5

#switchport mode access

#switchport access vlan 1

#no shut

#exit

 

The result:

#show vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi0/5, Gi0/8, Gi0/9, Gi0/10
Gi0/11, Gi0/12, Gi0/13, Gi0/14
Gi0/18, Gi0/19, Gi0/20, Gi0/22

 

image.png

As it works on my laptop, tomorrow will do a live test, will connect a device that it was not working before. Hope it does.

 

even that the ping is working and I could access the other network, I saw that the trunk status of the port is: NOT-TRUNKING, I guess it means that other VLan data will not be allowed to pass through:

 

#show interfaces gi0/5 trunk

 

Port Mode Encapsulation Status Native vlan
Gi0/5 off 802.1q not-trunking 14

Port Vlans allowed on trunk
Gi0/5 1

Port Vlans allowed and active in management domain
Gi0/5 1

Port Vlans in spanning tree forwarding state and not pruned
Gi0/5 1

I got the trunking!

 

BUT NOT ACCESS TO VLAN1 :(

 

TAN-SW2-MAINOFFICE#config
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
TAN-SW2-MAINOFFICE(config)#interface gi0/5
TAN-SW2-MAINOFFICE(config-if)#switchpor mode trunk

 

NO PING on VLAN1, VLAN14 works fine....

What I realized: 

 

1. I need to add Port gi0/5 to VLAN1

2. I can add it only using:

#configure

#interface range gi0/5

#switchport mode trun and this is enough

 

What I didnt know, is following:

 

#show vlan br - shows access ports
#show int trunk - show trucked interfaces/ports

Anyone to help, I got confused and stopped here:

 

Still cannot ping 199.164.42.1 on VLAN1.

 

Here is what port 5 looks like:

image.png

#show interfaces trunk

Port Mode Encapsulation Status Native vlan
Gi0/5 on 802.1q trunking 14

 

#show vlan br

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi0/8, Gi0/9, Gi0/10, Gi0/11, Gi0/12, Gi0/14, Gi0/18, Gi0/19
Gi0/20, Gi0/22

 

 

My last try was:

 

I read about mode dynamic auto, which allows the port to be either trunked or static.

 

(config-if-range)#switchport mode dynamic auto

 

Result:

#show interfaces trunk

Port Mode Encapsulation Status Native vlan
Gi0/5 auto 802.1q trunking 14

Port Vlans allowed on trunk
Gi0/5 1,14,100

 

Also I was able to ping both VLANS: 1 and 14 !!!! which is very nice !!

image.png

with my computer worked fine, but when connecting the other switches that are on VLAN 14, they didnt come up :(

setting back to switchport mode trunk, the devices appeared online. I dont understand :( . With this one I cannot connect to the other VLAN1.

 


#show interfaces trunk

Port Mode Encapsulation Status Native vlan
Gi0/5 on 802.1q trunking 14

Port Vlans allowed on trunk
Gi0/5 1,14,100

Apsarok
Beginner

VLAN 14 WORKS:

image.png

VLAN 1 DOES NOT WORK:

image.png