I am geting the below error on one of our Coreswitch MSFC. The IP (X.X.X.X) is placed as standby IP for VLANX. The same IP is assigned for backup Core switch as standby. There is no such error for other VLANs which is having same kind of standby IP
Please help me how to fix it.
%IP-4-DUPADDR: Duplicate address X.X.X.X on VlanX, sourced by <MAC - Address>
Have a look at this link
HTH, rate if it does
There is no information abt "%IP-4-DUPADDR". They have explained abt "%STANDBY-3-DUPADDR". I belive its different.
Eventhough the error message is different I suspect some STP loop. Because when I am doing the tracert, getting more then one hop for same IP.
1 1 1 y.y.y.y
* * * x.x.x.x
* * * x.x.x.x
* * * x.x.x.x
Note: this is happening for sometime only not always.
Please help me to fix this.
Thanks in Adv
Do you see any other HSRP messages along with the above error?
Would it be possible for you to trace the MAC address mentioned in the above error
Is that something like this ?
SWINFOR_1#show arp | include 172.20.1.3
Internet 172.20.1.3 - 0016.474a.6c7f ARPA Vlan1
Switch_1#show mac-address-table address 0016.474a.6c7f
vlan mac address type protocols port
1 0016.474a.6c7f static ip,ipx,assigned,other Switch
1135 0016.474a.6c7f static ip,ipx,assigned,other Switch
The same MAC-Address is seeng in several VLAN's?, and on the "show arp | inc mac.mac.mac", it takes for a - agetime?
If u use a dhcp server for ip attribution, make a reserve for the route/switch, and/or server's range ip's.
%IP-4-DUPADDR: Duplicate address X.X.X.X on VlanX, sourced by
Is that source mac address, the same mac when u do "show arp | inc (ip duplicated)" command ?
If it is not, perform a show mac-add MAC, till to final switch port.
When u arrives the final switch port, ShutDown the port, and wait for complaints. :)
Before u shut down that port assure that is no more than 1 mac-address on that port, could be a switch or hub connected, without management.
You could try 2 solution :
1. HSRP group ID make it one vlan one ID.
2. USE " ARP x.x.x.x y.y.y.y arpa alias "
x.x.x.x -> IP address : active and standby all
need to be config on self switch.
mean active switch config active
ip/mac pair, same as standby.
y.y.y.y -> MAC address.explain the same as
Hope this work !
I traced both the Core Switches. The MAC address is a Virtual address for VLANZ in Designated Switch. The Same MAC is assigned for more that one VLAN in non-Designated switch!!!
The VLAx MAC address is diff from this.
Will it be happen normaly? Is this related to this error msg?
As this error is our live core switch its bit urgent. Please help me.
sh stand vlanx
VlanX - Group X
Local state is Active, priority 130, may preempt
Hellotime 3 sec, holdtime 10 sec
Next hello sent in 2.032
Virtual IP address is x.x.x.1 configured
Active router is local
Standby router is x.x.x.2 expires in 8.180
Virtual mac address is aa.aa.aa
1 state changes, last state change 1w6d
IP redundancy name is "hsrp-Vlx-x" (default)
Sh run vlanx
ip address x.x.x.1 255.255.255.224 alt ip address x.x.x.3 255.255.255.224
no ip redirects
no ip proxy-arp
ip route-cache flow
standby x ip x.x.x.100 alt standby x ip x.x.x.100
standby x priority 140 alt standby x priority 130
standby x preempt