Help cau hinh FTTH VNPT tren router 1841

[choccobo17]

xin giup em cau hinh router hay bat ky su tro giup nao. boi vi khi em cau hinh router cisco ve duong ftth vnpt hcm, thi mot so trang web khong len duoc nhu www.gfi.com,yahoo.com. co`n trang google.com thi len duoc. Em co thu test tren may linux, em set mtu 1300 thi lai len duoc cac trang em neu tren, nhung voi windows pc thi thua.

xin cac thay va cac anh ho tro giup em ve van de nay

[phamminhtuan]

Chào bạn,

Tham khảo các thảo luận này và chỉnh lại cho phù hợp xem

http://vnpro.org/forum/showthread.php/21832-C%E1%BA%A5u-h%C3%ACnh-FTTH-c%E1%BB%A7a-FPT-tr%C3%AAn-Cisco-1800-serial/page2

http://vnpro.org/forum/showthread.php/10510-Nh%E1%BB%9D-AE-Review-d%E1%BB%8Bch-v%E1%BB%A5-FTTH/page4

[choccobo17]

Em da xem 2 link tren nhung van ko duoc. Em co tham khao them tren mang: vi moi lan em chinh MTU cho clien la 1300 thi chay duoc cac web, nhung minh khong the chinh lai MTU het may nen minh phai chinh tren Router. Em co tham khao link sau: http://www.tek-tips.com/viewthread.c...1557192&page=5
Set ports back to speed auto, full-duplex on interfaces of each router connected to MetroE UNLESS the vendor instructs you specifically to modify it. Since your MetroE is 3MB - worse case it will auto negotiate down to 10MB which is plenty more than 3MB. Next verify you don't have half-duplex. This will be a problem. If you have half-duplex - hard configure for full-duplex.

Next - Is this a fiber based service? If so set your MTU to 1300.

Can you ping across the network from host to host? If yes...then can you RDP or HTTP across from host to host? If this answer is no then you have a IP fragmentation issue.

issue "ip tcp mss-adjust 1340" on interfaces on both sides of the MetroE. If this 1340 value doesn't allow the Layer-4-7 application traffic lower the value until it works.
Em da chinh lai tcp mss-adjust 1340 tren cong giao tiep voi mang lan thi da chay duoc tat ca cac web.
:) Thanks