We help IT Professionals succeed at work.
Get Started

Cisco 1721 with two WAN (Internet) connections?

254 Views
Last Modified: 2010-04-10
Our company is considering adding a Cable connection to our 1721 Router to provide a redunant connection, as well as to provide an alternate route to a site or two we've been having traffic issues with (that, of course, is nobody's fault on our end, their end, or even the ISPs in the middle - I digress).

It's been a while since I had to do much of anything with our router.  We already have a fully functional T-1, and of course, the FastEthernet to our firewall.  It looks like there's an ethernet WAN interface option for the router that will interface with the cable modem, and I know enough to configure that to work with the cable provider.

My question is, what commands, if any, will I then need to utilizie to enable the cable connection to ask as an alternate route to the Internet?  I'm fairly certain I'll be able to make a static map to the host that's giving us trouble (ip route a.b.c.d 255.255.255.255 eth 0), but since our T-1 is the default gateway, it seems like I'll need some other routing options to allow the 1721 to "pick and choose" which path is best for outbound traffic at any time.

Would this be the time for me to brush up on routing protocols?  If I recall correctly those were more for "internal" routing - between connections I control.

Any information/thoughts/tips will be greatly appreciated.

I'll be happy to provide config snippets as requested (don't want to spam a ton of irrelevant config info here).
Comment
Watch Question
Systems Architect
CERTIFIED EXPERT
Top Expert 2008
Commented:
This problem has been solved!
Unlock 1 Answer and 2 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE