My lab is configured like this.

R1(s1)—-(s1)R2(s2)—–(s2)R3

R1 and R2 are connected via serial1 interfaces and R2 and R3 are connected via serial2 interfaces.

I am confused with ‘ip default-network’ command. I read a few notes about it and what they explain and what I see when I test it in a lab; has got some differences.

Almost all the notes that I read say;

If I give ‘ip default-network 1.1.1.0′ command in R2 (because I can reach 1.1.1.0/24 network from R2) I should see a gateway of last resort in R3.

But the reality is a little different from this.

What actually happens is, this doesn’t happen when I have given ‘no auto-summary’ command given in R1 and R2. But if I again say, ‘auto-summary’ in R1 and R2, then in R3 I see the gateway of last resort set to R2.

My second doubt is, when I give the command ‘show ip protocol’ in R1 and R2, I see something called, “(this router)” under Gateway. The outputs of show run, show ip route, show ip protocol commands are posted below.

Can someone please clarify this to me?

I have a scenario that I’ve been playing around with that compares the functionality between using iBGP vs. EIGRP in a failover setup. So far, iBGP proves to be more “customizable” in the fact that I can do conditional advertisements. The problem that I run into is this:

I have 2 routers and a L3 switch that currently runs BGP. One router (Router A) has a DS3 connection to the provider and a LAN connection into my switch. The other router (Router B) has only a LAN connection to my switch and a LAN connection to a MAN. With EIGRP, when I shut the ethernet interface on Router A, everything converges very quickly (much more quickly than with BGP). But, when I shut the serial side on Router A, the LAN side is still up and eigrp will eventually converge, but it takes a MUCH longer time. Is there something, route maps/distribution lists/eigrp options, that will allow me to do something like a conditional advertisement with eigrp? What I’m currently doing to make this faster in bgp is a conditional advertisement that says if the serial side subnet is missing, then deny advertising any routes. That forces all traffic through my backup router (Router B).

Please see the attachment for the description of my questions. . .

I see this error message in my Cisco 3750 switches.
Any one can tell me what’s the problem?

Oct 19 10:44:15: %PLATFORM_UCAST-3-ADJ:

MAD Lock failed (IP:10.172.1.1 MAD – rwi:10F ref:0 Ret:2)?

-Traceback= 6B2754 6A10E4 69AC5C 69B488 6F62A0 6F6D28 24EB34 24F26C 24FD10 373930 1ECFFC

can somebody send me an case study where the multicasting configuration is setting on router and switch.

Quick question regarding OSPF and unequal cost load balancing.
I know that OSPF does not support this and have realised that i can either adjust the costs for the interface or reconfigure to EIGRP.Are there any other options?

when a interface is configure like this
frame-relay intf-type dce
frame-relay route 210 interface Serial2/0/7:0 110
frame-relay route 215 interface Serial3/1/14:0 115
frame-relay route 220 interface Serial2/0/18:0 120
frame-relay route 225 interface Serial1/1/4:0 125
is it considered a point to point or a point to multipoint..
i noticed that you can only specify point to point or multipoint if you use subinterfaces, so what does it default to when you dont use subinterfaces..

We are about to rollout new MPLS circuits. I am trying to learn what we will need to configure on our routers (CE). The documentation I have found so far explains what happens on the P and PE routers, which seems to be the Provider’s responsibility.
Can anyone point me to documentation on what I need to configure on my end? We have one headend router at our data center and seven remote sites.
Thanks in advance for any direction or advice!

Deploying VWIC-2MFT-T1 cards in various routers & are experiencing errors & drops. Does anyone know if there are any known issues w/these cards? Also, regarding clocking, is there a particular way these cards should be configured, e.g. if there are 4 T1s on the router, only one of them can be configured as “clock source internal” & the rest MUST be “clock source line”?
Thanks in advance for your feedback!

Im looking for help on a design config where i want each interface to become active on an isdn link at increments of 25% i know the dialer load threshold kicks in the second channel after the percentage allocated. Is there some kind of bandwidth limiting command i could use to help with this.

Any help would be appreciated.