From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Wed Feb 04 2004 - 01:36:03 GMT-3
What does R2 look like? Is it possible that R2 is blocking GRE?
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 708-362-1418 (Outside the US and Canada)
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> alsontra@hotmail.com
> Sent: Tuesday, February 03, 2004 11:15 PM
> To: ccielab@groupstudy.com
> Subject: Re: IP GRE Tunnels
>
> ok. I typed the command "tunnel mode ipip" under both tunnel
> configurations
> and now everything works. I thought tunnels defaulted to GRE IP
> transport???
>
> Alsontra
>
> ----- Original Message -----
> From: <alsontra@hotmail.com>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, February 03, 2004 8:36 PM
> Subject: IP GRE Tunnels
>
>
> > Group,
> > As always, I'm assuming that some major misconception is
> keeping
> me
> > from figuring out a problem I'm having with a GRE tunnel configuration.
> The
> > configuration is extremely simple, but I can't figure out why I am
> unable
> to
> > ping the local tunnel interface on SW1.
> >
> >
> >
> > Topology
> >
> >
> > R5---------R2------------SW1
> > - -
> > --------tunnel0---------
> >
> >
> > On R5 I can ping the local and remote tunnel interface, but on SW1 I can
> only
> > ping the remote tunnel interface. I've double checked the IGP and
> everything
> > looks ok. I can ping all interfaces from R5. However, for some reason on
> SW1 I
> > can not ping the local tunnel interface. What have missed?
> >
> >
> > R5_CONFIG_abbreviated
> > __________________________________________
> > #
> > R5#sh run
> > !
> > ip subnet-zero
> > ip tcp synwait-time 5
> > no ip domain-lookup
> > !
> > ip multicast-routing
> > ip dvmrp route-limit 20000
> > !
> > !
> > interface Tunnel0
> > ip address 10.1.2.5 255.255.255.0
> > no ip directed-broadcast
> > tunnel source Serial0/2
> > tunnel destination 150.1.1.47
> > !
> > interface Serial0/2
> > ip address 141.1.1.5 255.255.255.0
> > ip directed-broadcast
> > ip pim nbma-mode
> > ip pim sparse-mode
> > encapsulation frame-relay
> > no ip split-horizon eigrp 100
> > no fair-queue
> > cdp enable
> > frame-relay map ip 141.1.1.2 130 broadcast
> > frame-relay map ip 141.1.1.6 120 broadcast
> > frame-relay lmi-type cisco
> > !
> > router eigrp 100
> > network 128.1.0.0
> > network 141.1.0.0
> > network 171.1.0.0
> > network 223.1.1.0
> > no auto-summary
> > !
> > ip classless
> > no ip http server
> > ip pim send-rp-announce Loopback1 scope 16
> > ip pim send-rp-discovery Loopback1 scope 16
> > !
> > R5#
> > R5#sh ip route
> > Gateway of last resort is not set
> >
> > 1.0.0.0/32 is subnetted, 1 subnets
> > C 1.1.1.5 is directly connected, Loopback0
> > 223.1.1.0/32 is subnetted, 4 subnets
> > D 223.1.1.6 [90/2297856] via 141.1.1.6, 02:21:25, Serial0/2
> > C 223.1.1.5 is directly connected, Loopback1
> > D 223.1.1.2 [90/2297856] via 141.1.1.2, 02:41:38, Serial0/2
> > D 223.1.1.47 [90/2323456] via 141.1.1.2, 00:04:45, Serial0/2
> > 191.1.0.0/24 is subnetted, 1 subnets
> > C 191.1.1.0 is directly connected, Loopback2
> > 141.1.0.0/24 is subnetted, 1 subnets
> > C 141.1.1.0 is directly connected, Serial0/2
> > 128.1.0.0/24 is subnetted, 1 subnets
> > C 128.1.1.0 is directly connected, Ethernet0/1
> > 10.0.0.0/24 is subnetted, 1 subnets
> > C 10.1.2.0 is directly connected, Tunnel0
> > 180.1.0.0/24 is subnetted, 1 subnets
> > C 180.1.1.0 is directly connected, Ethernet0/0
> > 150.1.0.0/24 is subnetted, 1 subnets
> > D 150.1.1.0 [90/2195456] via 141.1.1.2, 02:41:42, Serial0/2
> >
> >
> >
> > R2_CONFIG(not really important)
> >
> > SW1_CONFIG_abbreviated
> > __________________________________________
> > hostname SW1
> > !
> > interface Loopback1
> > ip address 223.1.1.47 255.255.255.255
> > !
> > interface Tunnel0
> > ip address 10.1.2.47 255.255.255.0
> > tunnel source Vlan13
> > tunnel destination 141.1.1.5
> > !
> > interface Vlan13
> > ip address 150.1.1.47 255.255.255.0
> > ip pim sparse-dense-mode
> > !
> > router eigrp 100
> > network 150.1.0.0
> > network 223.1.1.0
> > no auto-summary
> > no eigrp log-neighbor-changes
> > !
> > SW1#sh ip route
> >
> > Gateway of last resort is not set
> >
> > 223.1.1.0/32 is subnetted, 4 subnets
> > D 223.1.1.6 [90/2810112] via 150.1.1.2, 00:00:19, Vlan13
> > D 223.1.1.5 [90/2298112] via 150.1.1.2, 00:00:19, Vlan13
> > D 223.1.1.2 [90/130816] via 150.1.1.2, 00:00:19, Vlan13
> > C 223.1.1.47 is directly connected, Loopback1
> > 141.1.0.0/24 is subnetted, 1 subnets
> > D 141.1.1.0 [90/2170112] via 150.1.1.2, 00:00:19, Vlan13
> > 128.1.0.0/24 is subnetted, 1 subnets
> > D 128.1.1.0 [90/2195712] via 150.1.1.2, 00:00:19, Vlan13
> > 160.1.0.0/24 is subnetted, 1 subnets
> > C 160.1.1.0 is directly connected, Vlan12
> > 10.0.0.0/24 is subnetted, 1 subnets
> > C 10.1.2.0 is directly connected, Tunnel0
> > 150.1.0.0/24 is subnetted, 1 subnets
> > C 150.1.1.0 is directly connected, Vlan13
> >
> >
> >
> > Thanks,
> > Alsontra
> >
> > _______________________________________________________________________
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