08-20-2008 10:44 PM - edited 03-06-2019 12:56 AM
Hi All
Switch IP not seen by cdp neighbors detail
I have my switch in vtp transparent mode, created vlan's and a vlan Interface
Now, when i do a CDP neighbors detail from 10.10.10.235
I see my switch but no IP
Output:
Entry address(es):
IP address: 0.0.0.0
I neighter can ping the switch from the neighbor.
Here a part of my config:
vlan internal allocation policy ascending
!
vlan 115
name LD-VLAN-Management
!
interface GigabitEthernet0/25
description Glas to Zuerich 10.10.10.235
switchport trunk encapsulation dot1q
switchport trunk native vlan 115
switchport trunk allowed vlan 115,868,869
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface Vlan115
description Management VLAN
ip address 10.10.10.238 255.255.255.224
!
How can i get this to work.
I don't want my neighbor to have learn my VLAN's
This is a Production-switch, i can't just play around!
Who can help me?
Thanks
Willem
Solved! Go to Solution.
08-20-2008 11:29 PM
hi Massimiliano
In my knowledge the subnet of the two device not required to be same to see the device ip in the CDP neighbour detail.
I think the Nativ Vlan should be same and the Mgmt Vlan should have been given the IP address means vlan 1
Bhargav.
08-20-2008 10:51 PM
Hi,
The native VLAN is the same on other lik? That is on the other switch (the switch which is attached to "transparent-switch"), is the vlan native the same?
Best regards.
Massimiliano.
08-20-2008 10:58 PM
Hi Massimiliano
Yes, the native vlan on the other site is the same.
The trunk is up and running.
There is lots of traffic flowing even on different vlan's (868 and 869), transport works fine, just can't see the IP.
So i can't get remote on this switch,
Can't ping it.
08-20-2008 11:05 PM
Hi,
From that you're sayng the layer 2 connectivity is good. A problem might be layer3 connectivity....the subnet mask of the vlan is the same on the two switches?
Massimiliano.
08-20-2008 11:29 PM
hi Massimiliano
In my knowledge the subnet of the two device not required to be same to see the device ip in the CDP neighbour detail.
I think the Nativ Vlan should be same and the Mgmt Vlan should have been given the IP address means vlan 1
Bhargav.
08-20-2008 11:30 PM
Hi,
Yes sure..
But the problem is that you're not pinging the device..
Massimiliano.
08-20-2008 11:38 PM
yes
he just want to see the IP detail in the CDP neighbour
i think his problem is that only
Bhargav
08-21-2008 06:11 AM
Hi All
Thanks for the feedbacks!
"the Nativ Vlan should be same and the Mgmt Vlan should have been given the IP address means vlan 1" brought me on the point.
Looking at my config, i allowed only vlan 115,868 and 869 NOT vlan 1 !!
Also i had vlan 115 as native vlan, on the other end there was no such statement, so vlan 1 was native there.
Thanks all
Willem
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