From: Scott, Tyson C (tyson.scott@hp.com)
Date: Sat Feb 28 2004 - 15:14:42 GMT-3
Yes, your issue is with the ISP. You need to work with them so they are
advertising your network back over the ADSL, however you want them to do
it.
Regards,
Tyson Scott
Agilent Problem Management Team
Managed Network Services
Phone: 313-583-5812
Pager: 877-997-0811
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jay Hennigan
Sent: Saturday, February 28, 2004 12:38 AM
To: Church, Chuck
Cc: Alex Hsieh; CCIE R&S Mailing list
Subject: RE: Wan link backup
On Fri, 27 Feb 2004, Church, Chuck wrote:
> The inbound HTTP would be tough to fix without BGP. Mail is easy
> though. Create another MX record with a lower priority pointing to
> an address valid on the DSL link. On the other hand, you've got a
> router that can certainly handle BGP. Might be a better solution...
I don't see where BGP would be needed here as both links are from the
same ISP. A dynamic routing protocol such as OSPF or even a simple
floating static of your routed addresses over the ADSL link over the
static on the DS-3 and a corresponding floating static default towards
the ADSL on your end should do the trick.
Either of these requires the cooperation and some clue on the part of
your ISP, of course.
We do this all the time for DSL backup of T-1 and greater.
> > -----Original Message-----
> > From: Alex Hsieh [mailto:ccie21@hotmail.com]
> >
> > Our company currently uses 3725 router with 2 wan links,one T3,
> >
> > the other is 1.5M ADSL.We use ADSL as backup connection.Both links
> >
> > belong to same ISP.The other day when T3 breaks,ADSL link come up.
> >
> > Outbound connection works,but outside can't establish inbound
> > connection
> >
> > to our server (mail,www).Is there anyway to enable inbound
> > server connection
> >
> > other than using BGP or other load-balancing device?Thanks.
-- Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net WestNet: Connecting you to the planet. 805 884-6323 WB6RDV NetLojix Communications, Inc. - http://www.netlojix.com/
This archive was generated by hypermail 2.1.4 : Fri Mar 05 2004 - 07:13:59 GMT-3