Anh chi giup em cau hinh Policy Based Routing & NAT

[maokhoeun]

Attched file ben duoi la so do mang cua em.
em co van de nhu sau can anh chi giup:
1. Neu traffic den tu client trong mang LAN cua em la WWW, chat, thi duoc route sang ISP 1, neu ISP 1 bi down, thi no se duoc route sang IPS 2, va neu ISP 2 va ISP 1 ca hai deu down, thi no se duoc route sang ISP 0.
2. Neu traffic den tu client trong mang LAN cua em la Send Mail, telnet, thi duoc route sang ISP 0, neu ISP 0 bi down, thi no se duoc route sang IPS 1, va neu ISP 0 va ISP 1 ca hai deu down, thi no se duoc route sang ISP 2.
3. Nguoc lai, neu ai do o ngoai muon send mail, telnet cho mang LAN ben trong cua em, thi traffic do fai di qua ISP 0.
3. Con van de NAT, vi co tat ca la co 3 ISP, thi fai NAT the nao?

Luu Y: ISP 0 muc dich la de nhan, gui mail, telenet
ISP 1 va ISP 2 la dung de back up cho nhau va muc dich chinh la de cho user truy cap www, chat, download file....

Mong anh chi giup!!!!

[kissssss]

Thử dùng ACL
:)

[ptran]

Ban co xu dung BGP routing voi ca ba ISP do khong? Neu khong co BGP thi chiu thua thoi. Neu co BGP thi moi tinh toi duoc. Vi co telnet va sendmail vao trong LAN cho nen khong co BGP thi khong backup duoc.