Duplicate Address errors always related to some miconfiguration with the ip address on the interfaces.
i also did try the error message decoder which also proved to be same..
do find the same and find the recommended action to overcome this problem..
The IP address in an HSRP message that was received on the specified interface is the same as the IP address of the router. Another router might be configured with the same IP address. The most likely cause of this condition is a network loop or a misconfigured switch that is causing the router to see its own HSRP hello messages.
Recommended Action: Check the configurations on all the HSRP routers to ensure that the interface IP addresses are unique. Make sure that no network loops exist. If port channels are configured, check that the switch is correctly configured for port channels. Enter the standby use-bia command so that the error message displays the interface MAC address of the sending router, which can be used to determine if the error message is caused by a misconfigured router or a network loop
Do a show standby on both switches. This will show if the VLAN interfaces are in active or stanby mode. My guess is that both think they are in active mode. If this is the case, then I would suspect that the native vlan is the culprit and both vlan interfaces can not negotiate.
Most of the times HSRP duplicate address error is due to IP conflict in network.
Check you DHCP server scope, may be one of the IP address configured in your switches is included in DHCP scope, when the same IP is assigned to any host by DHCP switch will report duplicate address error. This is the very basic cause; check it. There can be some other reasons also.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...