Question

dual ISP (failover and load balance)

Asked by: mikeleebrla

here is the situation.   I currently have one internet T-1 coming into a cisco 2621 router (aka my internet router) on the serial port.  I have a new internet circuit (2MB) from another provider (they give me an ethernet handoff) that i would like to add to this router and load balance the traffic.  All of my public stuff (email, VPNs etc) are tied to the IPs on the T-1.  A network map is below:

T-1 internet-----|
                       2621---DMZ switch-------Pix 525-------3560Switch-----3825Router (internal router)-------PTP circuits to various internal sites
2MB internet----|                                                              |
                                                                                 LAN at site1

so here are my questions:

1.  can a 2621 load balance between dissimilar ports (serial and FE)? And if so how?
2.  what will i need to change on the PIX's config since currently the 'global'  IP address is my publically exposed IP on the T-1.  Where do the IPs for the 2MB internet connection come into play on the PIX?
3.  where do the new public IPs come into play on the 2621 router. Can i have dual gateways set?
4.  we host our own email server, so if i end up load balancing all outboud traffic out of the 2 ISPs will that mess up my email since sometimes the reverse DNS IP will not match?

Thanks in advance,
Mike

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Asked On
2007-02-01 at 12:17:29ID22145965
Tags

isp

,

load

,

failover

,

dual

Topics

Miscellaneous Networking

,

Networking Hardware Firewalls

,

File Transfer Protocol (FTP)

Participating Experts
2
Points
500
Comments
13

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