RE: Cisco 6506 and BGP problem

From: Mike Williams (ccie2be@swbell.net)
Date: Fri Sep 05 2003 - 00:52:25 GMT-3


How's this?

   TEL
    |
    |
   6509----EDU
    #1
    |
    |
 210.39.66.19

It seems to me that you would want a couple of VLANs. Let's say VLAN100
for 201.101.2.16/28 and Interface VLAN100 has an IP of 201.101.2.17/28.
Also say VLAN200 is 210.39.66.0/24 and Interface VLAN200 has an IP of
210.39.66.1/24. No matter which VLAN the client is in (using your
example of a host with 210.39.66.19), once it hits the router (MSFC) on
the 6500, it will see whatever routes to the Internet you choose. YOU
have control. With Brian's suggestion, the route processor will see two
equal paths (two routes to 0.0.0.0), one out each internet connection.
The packet will simply go where the router says.

Why can't a host 210.39.66.19 access the internet through the Tel ISP?
If the TEL ISP is blocking the EDU address space, then you can't really
use the links for redundancy or load-balancing.

Mike W.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
zhang-meng
Sent: Thursday, September 04, 2003 10:17 PM
To: hpadilla@cisco.com; 'Brian McGahan'; 'zhang-meng'; 'Ccielab
(E-mail)'
Subject: ??: Cisco 6506 and BGP problem

Hi: Guy
Thanks your response
But it is no ok for default route
for example:
two ISP
Tel ISP : router---address 201.101.1.6/30
                host address 201.101.2.16/28
Edu ISP: route address 210.35.1.130/30
                host address 210.39.66.0/24
When EDU a host 210.39.66.19 can't access from Tel ISP.

How to use CEF.

-----????-----
???: Hugo Padilla Prad [mailto:hpadilla@cisco.com]
????: 2003?9?5? 11:09
???: 'Brian McGahan'; 'zhang-meng'; 'Ccielab (E-mail)'
??: RE: Cisco 6506 and BGP problem

Brian,

My understanding is that 6506 doesn't support per-packet load balance.
Regards,

-Hugo

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian McGahan
Sent: Thursday, September 04, 2003 10:18 AM
To: 'zhang-meng'; 'Ccielab (E-mail)'
Subject: RE: Cisco 6506 and BGP problem

Meng,

        Why not just put two static default routes? With CEF you can
load balance between these routes on a per-packet or per-destination
basis.

HTH,

Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-334-8987
Direct: 708-362-1418 (Outside the US and Canada)

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
zhang-meng
Sent: Thursday, September 04, 2003 4:02 AM
To: Ccielab (E-mail)
Subject: Cisco 6506 and BGP problem

    Hi: Group
       A problem, I want to use 6506 (with layer 3 function) to connect
with two ISP(using two 1000BaseT port) load balance, but Tel can't
support BGP, they worried statibility.
     What kinds of solution and Could you give some suggestion and
design.

    Regards
    Meng Zhang



This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:23 GMT-3