Switch IP not seen by cdp neighbors detail

VTP, Portfast, Spanning Tree and all the other switch related stuff.
Guest

Switch IP not seen by cdp neighbors detail

Post by Guest » Sat Jan 08, 2011 1:26 pm


Hi AllSwitch IP not seen by cdp neighbors detailI have my switch in vtp transparent mode, created vlan's and a vlan InterfaceNow, when i do a CDP neighbors detail from 10.10.10.235 I see my switch but no IPOutput:Entry address(es):  IP address: 0.0.0.0I 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?ThanksWillem

Guest

Re:Switch IP not seen by cdp neighbors detail

Post by Guest » Sat Jan 08, 2011 2:23 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.

Guest

Re:Switch IP not seen by cdp neighbors detail

Post by Guest » Sat Jan 08, 2011 2:51 pm


Hi MassimilianoYes, 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.

Guest

Re:Switch IP not seen by cdp neighbors detail

Post by Guest » Sat Jan 08, 2011 4:00 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.

Guest

Re:Switch IP not seen by cdp neighbors detail

Post by Guest » Sat Jan 08, 2011 4:17 pm


hi MassimilianoIn 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 1Bhargav.

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