06-29-2017 12:03 AM - edited 03-08-2019 11:08 AM
Hello,
Following is seen on a switch which has layer 3 for vlan 11.
sh ip arp | i 7af2
Internet 192.168.96.145 42 50bd.9dc4.7af2 ARPA Vlan11
Internet 192.168.96.52 43 50bd.9dc4.7af2 ARPA Vlan11
Internet 192.168.96.18 0 50bd.9dc4.7af2 ARPA Vlan11
the user got an ip conflict message. Eventually, user ended up with 192.168.96.18 IP.
is the layer 3 switch doing something that causes this.
Appreciate if someone can put some light on this to investigate further. the SVI vlan configuration
is also given. Thanks in advance.
(mac 50bd.9dc4.7af2 belongs to the user)
interface Vlan6
ip address 192.168.96.0 255.255.240.0
ip helper-address 10.56.0.12
no ip redirects
no ip unreachables
ip directed-broadcast 101
no ip proxy-arp
ip verify unicast source reachable-via rx
ip pim dr-priority 100
ip pim sparse-mode
06-29-2017 02:06 AM
Hello,
from arp table we can see that you effectively use address space 192.168.96.x/unknown mask in vlan 11. from vlan 6 SVI we can see that you are using the same address space on Vlan6. This is not correct and causes conflict. It may be misconfiguration of VLAN11 SVI or misconfiguration of DHCP server.
Regards
Stepan
06-29-2017 05:05 PM
apologies, that is a typo.
Vlan 11 is correct . Appreciate inputs.
sh ip arp | i 7af2
Internet 192.168.96.145 42 50bd.9dc4.7af2 ARPA Vlan11
Internet 192.168.96.52 43 50bd.9dc4.7af2 ARPA Vlan11
Internet 192.168.96.18 0 50bd.9dc4.7af2 ARPA Vlan11
interface Vlan11
ip address 192.168.96.0 255.255.240.0
ip helper-address 10.56.0.12
no ip redirects
no ip unreachables
ip directed-broadcast 101
no ip proxy-arp
ip verify unicast source reachable-via rx
ip pim dr-priority 100
ip pim sparse-mode
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