From: alsontra@hotmail.com
Date: Wed Feb 04 2004 - 02:14:31 GMT-3
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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This archive was generated by hypermail 2.1.4 : Fri Mar 05 2004 - 07:13:45 GMT-3