Vincent C Jones
Guest
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 Posted:
Mon Dec 05, 2005 12:45 am Post subject:
Re: Propagating backup default routes via EIGRP for multiple |
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In article <1133449418.483912.31200@g49g2000cwa.googlegroups.com>,
steve_nsi <steve@nurserysupplies.com> wrote:
| Quote: | I have four seperate sites all connected across an MPLS network and
each has it's own seperate DSL Internet connection terminated by a
firewall. I want to configure this so that when one Internet
connection is down, the Internet traffic for that site is automatically
re-routed through one of the other sites.
I think I have everything setup correctly but the problem is, the Cisco
routers on the provider's MPLS build out that I'm connecting to are
outside of my control. I have tried to push the static routes through
EIGRP since I am running EIGRP through those already but it doesn't
seem to stick in the provider's routers.
I can ping a remote router or firewall no problem. If I try to ping
the Internet through a remote connection I get a TTL expired in transit
from the near provider edge router. This behavior is consistant across
all locations.
What I'm trying to do seems simple but I cannot make it work.
Any ideas what I'm doing wrong?
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Sounds like you need to advertise a default route to the MPLS PE
routers, using the same mechanism you use for the subnets that make
up your internal network. Alternatively, have your MPLS provider
route unknown destinations directly to the Internet (just make sure
this is acceptable to your security needs, don't assume the MPLS
provider will protect you from malicious attacks if you use them
for Internet access).
To get this to work automatically, you'll also need a mechanism to
detect when your firewall has lost its DSL connection.
Good luck and have fun!
--
Vincent C Jones, Consultant Expert advice and a helping hand
Networking Unlimited, Inc. for those who want to manage and
Tenafly, NJ Phone: 201 568-7810 control their networking destiny
http://www.networkingunlimited.com |
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