wireless client unable to get ip address from Aruba controller on few DHCP scope
|Issue||wireless client unable to get ip address from Aruba controller on few DHCP scope|
|Environment||Aruba DMZ Controller ( dhcp server) >> DMZ Switches >> AP125 Wired port >> Cisco Switch >> Cisco Aps and Controllers >> wireless clients|
Clients on vlan 3108 DHCP scope unable to get an Ip address. However, clients are in vlan 3016 were able to get an IP address.
Cisco Controller vlan 3108 IP: 172.30.108.4
Cisco Controller vlan 3016 IP: 172.30.16.7
Aruba Controller vlan 3108 IP: 172.30.108.1
Aruba Controller vlan 3016 IP: 172.30.16.1
On the Aruba controller pcap, we observed that the Cisco controller (172.30.108.4) sent dhcp discover and Aruba controller (172.30.108.1) didn’t response on vlan 3108 .However, the same controller sent dhcp offer on vlan 3016 (172.30.16.1 on controller). ( in filter1.pcap in attached log)
vlan 3068 172.30.68.1 / 255.255.255.0 up up
We made the below changes but no luck.
We observed that there was misconfiguration while excluding the IP address.
ip dhcp excluded-address 172.30.68.1 220.127.116.11 <=========================
ip dhcp excluded-address 172.30.108.1 172.30.108.15
ip dhcp excluded-address 172.30.16.1 172.30.16.15
We changed the “ ip dhcp excluded-address 172.30.68.1 18.104.22.168” to “ ip dhcp excluded-address 172.30.68.1 172.30.68.15” and the clients were able to get an Ip address from Vlan 3108.