How to configure access from one VLAN to another VLAN?

Question

Cisco

There is a cisco 2851. The provider has allocated a pool of addresses

interface Loopback7
ip address 89.109.244.17 255.255.255.248
no ip redirects

which I configured to subinterfaces

ip route 89.109.244.18 255.255.255.255 GigabitEthernet0/0.718
ip route 89.109.244.19 255.255.255.255 GigabitEthernet0/0.719

Outside, users connect without problems. Just don't ping.
Inside the network, one client owns two subinterfaces, with GigabitEthernet0/0.718 it cannot get to GigabitEthernet0/0.719 and vice versa.

Answer 1

Outside you have a trunk, and inside you probably access.
Have you created vlans and assigned them to interfaces?
If inside access:
sw1(config-if)# switchport mode access
sw1(config-if)# switchport access vlan 2

Answer 2

zone-pair security [INSIDE18/19] source [INSIDE-*-89-109-244-19] destination [INSIDE-*-89-109-244-18]
zone-pair security [INSIDE19/18] source [INSIDE- *-89-109-244-18] destination [INSIDE-*-89-109-244-19] you can think of
the syntax and policies yourself
And another question, what values ​​do your clients set in IP\Mask | Gateway