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- Access to the Internet is performed in vlan 2301, using the default gateway 172.16.0.1 (router-NAT) for the default route. User egress is done by routing to router-NAT, which performs NAT translation of user addresses to the Internet.
- ESR control network is located in vlan 2300, subnet 100.123.0.0/24, which is also used for interaction with SoftWLC complex (ip address 100.123.0.2).
- APs receive the primary IP address from 192.168.240.0/23 network via DHCP-relay switch/router from the DHCP server installed on the server with SoftWLC. In option 43, suboptions 11 and 12, 2 addresses are passed to raise GRE tunnels: 192.168.200.17 and 192.168.200.18 (see description of How to configure option 43, and other DHCP configuration aspects). In this case, all traffic from the APs will be untagged. The APs raise 2 EoGRE tunnels from the primary address received via DHCP to the addresses received in suboptions 11 and 12:
- in Management GRE tunnel to the address 192.168.200.17 with vlan id = 1, the AP management traffic is transmitted.
- in Data GRE tunnel to the address 192.168.200.18 with vlan id = N, the traffic of users connected to the AP, on which SSID is configured (in the given example vlans 10 and 11) is transmitted. - Through Management GRE tunnel (vlan id 1) DHCP requests are received from the AP, which are redirected to SoftWLC using DHCP-relay on ESR. The DHCP server configured on SoftWLC issues an IP address from the network 10.255.252.0/23 for the AP, the gateway will be bridge 3 ESR with the address 10.255.252.1. In option 43.10 the address of SoftWLC server is passed: 10.123.0.2, (see the description of How to configure option 43, and other DHCP configuration aspects). The same address will be used to exchange service information between the AP and SoftWLC.
- SSID 1 and SSID 2 are configured on the AP using SoftWLC complex, which will tag user traffic with vlan 10 and 11 tag respectively. All user traffic will be forwarded from vlan 10 and 11 inside Data GRE tunnel to ESR. DHCP client requests using DHCP relay ESR will be forwarded to SoftWLC. Users get addresses from bridge 10 ESR network 198.18.148.0/22, gateway address 198.18.148.1. Bridge 11 ESR users get addresses from network 198.18.152.0/22, gateway address 198.18.152.1.
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