[c-nsp] Issues created by "ip address dhcp"

[Tuc at T-B-O-H.NET]

Hi,

	Once again, I spoke out of turn PARTIALLY....

	The part where it learns a route and is using it exclusively...
I think I saw it during setup when things weren't stable and I never
revisited it. Now that things are working better, and I have my BVI
working properly, and my tracking is working, etc... My routing looks
right. 

	I still have the problem, though, of the "ip route" statement
and not being 100% sure what the "gateway" it gets is... I think I might
just keep the hardcode of 192.168.0.1 and if it breaks, I'll live.

			Thanks! Tuc
> 
> I just implemented something similar at home, load-balancing between a
> cable modem and a T1.  I'm running 12.3(22) on a 2621.    Here's what
> I've seen.  A default route learned via DHCP has a distance of 254, so
> it should be overridden by your static route out through SEABREEZE.
> This cannot be manually overridden by adding a static default with
> "<interface> dhcp <distance>" as the next-hop AFAICT.
> 
> On 7/13/07, Tuc at T-B-O-H.NET <ml at t-b-o-h.net> wrote:
> > Hi,
> >
> >         BTW: Thanks to everyone helping with my questions... I know I'm
> > going to get burnt bad since I'm doing a few weird things, as well as :
> >
> >         1) Doing it on Friday the 13th.. I usually don't do anything on it.
> >         2) Its a Friday, and I usually NEVER do any network stuff on a Friday.
> >         3) I'm doing network changes at a remote site that if it goes down
> >                 I have to RENT a jeep to get to it after a 9 hour drive
> >
> >         SO.....
> >
> >         I'm actually trying to implement :
> >
> >                 http://www.nil.si/ipcorner/SmallSiteMultiHoming/
> >
> >         I have 1 connection to a local Wireless ISP on E0/0 . I have 1
> > connection to a satellite ISP on E1/0. I have E0/1 and E1/1 in a bridge
> > group with a 2924 hanging off each. SO, I did :
> >
> > bridge irb
> >
> > interface Ethernet0/0
> >  description SEABREEZE CONNECTIONS WIRELESS T-1
> >  ip address 192.168.75.49 255.255.255.0
> >  ip nat outside
> >  ip virtual-reassembly
> >  half-duplex
> > !
> > interface Ethernet0/1
> >  description BRIDGE FOR 2924-1
> >  no ip address
> >  half-duplex
> >  bridge-group 1
> > !
> > interface Ethernet1/0
> >  description HUGHES SATELLITE
> >  ip address dhcp
> >  ip nat outside
> >  ip virtual-reassembly
> >  shutdown
> >  half-duplex
> > !
> > interface Ethernet1/1
> >  description BRIDGE FOR 2924-2
> >  no ip address
> >  half-duplex
> >  bridge-group 1
> > !
> > interface BVI1
> >  ip address 192.168.3.254 255.255.255.0
> >  ip nat inside
> >  ip virtual-reassembly
> >
> > ip route 0.0.0.0 0.0.0.0 192.168.75.1 10 name SEABREEZE
> > ip route 0.0.0.0 0.0.0.0 192.168.0.1 251 name HUGHES
> > !
> > ip nat inside source route-map HUGHES interface Ethernet1/0 overload
> > ip nat inside source route-map SEABREEZE interface Ethernet0/0 overload
> > !
> > logging 192.168.3.150
> > snmp-server community hackme RO
> > !
> > route-map HUGHES permit 10
> >  match interface Ethernet1/0
> > !
> > route-map SEABREEZE permit 10
> >  match interface Ethernet0/0
> > !
> > bridge 1 protocol ieee
> > bridge 1 route ip
> >
> >         I've run into 2 problems/issues (Hence why E1/0 is shutdown).
> >
> >
> > 1) When I DHCP on E1/0, it doesn't care about my "ip route 0.0.0.0" statements,
> > it ends up with a static route out to E1/0.  I couldn't find a "ip address
> > dhcp ignore-default-route" type command. Is there one? Or do I need to
> > do some sort of a route-map filter for default route? Can I do that with
> > dhcp?
> >
> > 2) How do I properly code the "ip route 0.0.0.0" for the HUGHES connection.
> > I had to hardcode the next hop for the SEABREEZE since its not a point to
> > point connection. I need/want to do the same with the HUGHES, and I pretty
> > much KNOW the IP *SHOULD* be the 192.168.0.1 IP, but knowing my luck it
> > may/will change. I tried "ip route 0.0.0.0 0.0.0.0 e1/0 dhcp 251" but then it
> > won't let me name the route (And I'm not sure if I ever end up DHCPing on
> > the SEABREEZE if it'll pick up the right one too).
> >
> >
> >                 Thanks! Tuc
> > _______________________________________________
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> >
> 
> 
> -- 
> Shawn Morris
> IP Development - NTT America
> shawn at smorris.com/shawn at ntt.net/shawn at us.ntt.net
> v: +1 214 915 1361 f: +1 815 327 3016
>