I did the following in the router Cisco 888
crypto isakmp policy 40
encr aes 256
authentication pre-share
group 2
lifetime 28800
crypto isakmp key password address x.x.x.x
!
crypto ipsec security-association lifetime seconds 28800
!
crypto ipsec transform-set X-VPN esp-aes 256 esp-sha-hmac
mode tunnel
!
!
!
crypto map VPN-X local-address Loopback2
crypto map VPN-X 101 ipsec-isakmp
set peer x.x.x.x
set security-association lifetime kilobytes 102400000
set security-association lifetime seconds 3600
set transform-set X-VPN
match address 183
!
!
!
!
!
!
interface Loopback2
ip address y.y.y.y 255.255.255.255
interface Ethernet0.100
encapsulation dot1Q 100
ip address 10.41.218.2 255.255.255.252
ip access-group 181 in
ip tcp adjust-mss 1350
crypto map VPN-X
access-list 181 permit ip host x.x.x.x host y.y.y.y
access-list 183 permit ip a.a.a.a 0.0.0.255 192.168.8.0 0.0.0.255
access-list 183 permit ip b.b.b.b 0.0.0.255 192.168.8.0 0.0.0.255
access-list 183 permit ip c.c.c.c 0.0.1.255 192.168.8.0 0.0.0.255
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The Azure XML
<NetworkConfiguration xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/ServiceHosting/2011/07/NetworkConfiguration">
<VirtualNetworkConfiguration>
<LocalNetworkSites>
<LocalNetworkSite name="Man">
<AddressSpace>
<AddressPrefix>c.c.c.c/23</AddressPrefix>
<AddressPrefix>b.b.b.b/24</AddressPrefix>
<AddressPrefix>a.a.a.a/24</AddressPrefix>
</AddressSpace>
<VPNGatewayAddress>y.y.y.y</VPNGatewayAddress>
</LocalNetworkSite>
</LocalNetworkSites>
<VirtualNetworkSites>
<VirtualNetworkSite name="Azure8" Location="North Central US">
<AddressSpace>
<AddressPrefix>192.168.8.0/24</AddressPrefix>
</AddressSpace>
<Subnets>
<Subnet name="Subnet8-01">
<AddressPrefix>192.168.8.0/27</AddressPrefix>
</Subnet>
<Subnet name="GatewaySubnet">
<AddressPrefix>192.168.8.32/29</AddressPrefix>
</Subnet>
</Subnets>
<Gateway>
<ConnectionsToLocalNetwork>
<LocalNetworkSiteRef name="Man">
<Connection type="IPsec" />
</LocalNetworkSiteRef>
</ConnectionsToLocalNetwork>
</Gateway>
</VirtualNetworkSite>
</VirtualNetworkSites>
</VirtualNetworkConfiguration>
</NetworkConfiguration>
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I did the previous but still not connected kindly help