ISP-A --> Hand off via ISPs router(managed by ISP- no natting used on rtr) Ethernet handoff --> switch1 --> ASA outside i/f : priamry link
ISP-B Serial -->Client router (no nat) --> rtr ethernet to Switch1 --> PIX outside i/f: Backup link
Switch1: Layer2 only
Vlan10 : for ISPA handoff & ASA outside port
Vlan11 : for ISPB handoff & PIX outside port
Current failover method : Manual.
Both ISPs assigned /28 ip range for cleint.
Need to reconfigure for Automatic failover. Get rid of PIX
Client has /24 Arin assigned IP space (18.104.22.168/24) and own ASN and would like move all the IPs to his own space
This is what Iam planning on:
1. Make sure both ISPs advertise client public IP space via BGP (ISPB as secondary with help of BGP AS Path)
2. Reassign the existing IP (from ISPA assigned address space) on ISP A router Fast Eht 0/1 (connects to Switch1) : 22.214.171.124
Reassign the existing IP (from ISPB assigned address space) on other router Fast Eht 0/1 (connects to Switch1) : 126.96.36.199
Place both the ports on same Vlan on Switch1.
Configure HSRP with standby IP : 188.8.131.52 and ISPA router HSRP config will track external interface on ISP A router
3. Now when I take out the ISPs assigned IPs from respective routers and assign clent Own ip there, do the ISPs have to form BGP neighbor with my IPs on the routers..? or do I have to leave the ISP IPs same and have the client IPs as secondary Ips on the rtr interface (in which case HSRP may not work)
Also, the above set up will work or not..? Please suggest...
Thank you in advace