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Two ISP Problem

3 replies [Last post]
Wed, 2012-07-18 04:06
sushilwagh123
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Joined: 2012-07-16
Posts: 1

My question simple Here is the link
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SUSHIl WAGH
-CCNA MCSE-

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Thu, 2012-07-19 13:00
#1
syrushcw
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Joined: 2012-07-19
Posts: 1

I would make 2 access lists one for the server and one for the public IP's that you want to translate

ip access-list SERVER
permit 192.168.1.4 0.0.0.0 (Server you want with 2 translations)

ip access-list PUBLIC_IPS
permit 1.1.1.4 0.0.0.0 (WAN IP 1)
permit 2.2.2.4 0.0.0.0 (WAN IP 2)

then make a nat statement

ip nat inside source list SERVER pool PUBLIC_IPS

Do not use overload/PAT

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Thu, 2012-09-20 15:56
#2
Brain2000
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Joined: 2012-09-16
Posts: 10

I would see if your ISPs would allow you to make a BGP advertisement, and then just advertise one /24 subnet to both ISP's, and map just one set of public IP's to the servers. Then if one ISP goes down, the other will continue to work.

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Sat, 2012-09-22 06:36
#3
vignesh2004
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Joined: 2012-09-22
Posts: 4

I would summarize and let a routing protocol do the rest( with some co-ordination from ISP of course)

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