Thank you for you help but it is not an IP conflict. Here are the IPs and masks on each interface. Linux - eth0 20.0.0.249/24 Linux tunnel is 192.168.2.4/24 Cisco FastEthernet3/0 is 20.0.0.250/24 Cisco tunnel address is 192.168.2.2/24 Cisco configuration for the tunnel ! interface Tunnel0 ip address 192.168.2.2 255.255.255.0 ip rip send version 2 ip rip receive version 2 tunnel source FastEthernet3/0 tunnel destination 20.0.0.249 ! Mike Tedesco Technical Operation Engineer Broadband Maritime Inc. 61 Broadway, 19th floor New York, NY 10006 Tel: 212-405-1055 Fax: 212-202-7990 Cell: 518-892-1172 mtedesco@xxxxxxxxxxxxxxxxxxxxx This message is for the named person's use only. It may contain confidential, proprietary or legally privileged material. You must not, directly or indirectly, disclose, distribute, forward or copy any part of this message or any of its attachments without the permission of Broadband Maritime Inc. -----Original Message----- From: lartc-admin@xxxxxxxxxxxxxxx [mailto:lartc-admin@xxxxxxxxxxxxxxx] On Behalf Of Joe Nuts Sent: Monday, February 14, 2005 1:39 AM To: Michael Tedesco Cc: lartc@xxxxxxxxxxxxxxx Subject: Re: GRE tunnel problems Hi Michael, To answer your two questions first, 1) about the rtnetlink error when trying to add the route : in my experience, when creating the gre tunnel, it automatically creates the route for you when you set the link to 'up' and add an address to the device. you need to make sure you put the /xx netmask after the address though, so it knows what route to create. if you dont put anything after it, it will assume a /32, and you wont get any auto-created routes. (probably not what you want). either way, you can check your existing routes with the 'ip route' command 2) I'm assuming the gre device is created when you modprobe gre. I have gre built in to my kernel, so the device always exists for me. as for why it's not working, it might have something to do with your IP's conflicting. from the output you gave, it looks like linux/eth0 has the IP 20.0.0.249, as does the cisco/eth0. same goes for the tunnel. both devices have the 192.168.2.4 IP. if you want everything to work right, the linux and cisco devices will need independent IP's. to change the IP on the linux, you can do this : #ip address del 20.0.0.249/24 dev eth0 #ip address add 20.0.0.250/24 dev eth0 #ip address del 192.168.2.4/24 dev tunnel0 (assuming 192.168.2.5 isnt taken) #ip address add 192.168.2.5/24 dev tunnel0 and of course, your tunnel remote and local will have to be swapped use the following command when you create your tunnel. [root@TestLinux root]# ip tunnel add tunnel0 mode gre remote 20.0.0.249 local 20.0.0.250 Good Luck -Joe On Sun, 13 Feb 2005 12:16:15 -0500, Michael Tedesco <mtedesco@xxxxxxxxxxxxxxxxxxxxx> wrote: > > > Hello, > > > > Here is my network: > > > > ------------------ ------------- > > ----------- Linux box ----------- GRE --------- Cisco ---------- > > ------------------ ------------- > > > > What I wan to accomplish. I want ripv2 to go across (both ways) through the > GRE tunnel. > > > > No packets are being passed thought the GRE tunnel0. So first I have to fix > my GRE tunnel. Well it seems that way anyways. I also have two questions at > the below in bold. If you need anymore info please ask. > > > > I am using quagga and ripd daemons also. > > Quagga version - quagga-0.96.4-1.1 > > Kernal version - Linux 2.6.10 > > > > Mike > > > > This is how I configure my GRE tunnel: > > [root@TestLinux root]# modprobe ip_gre > > [root@TestLinux root]# ip tunnel add tunnel0 mode gre remote 20.0.0.250 > local 20.0.0.249 > > [root@TestLinux root]# ip link set tunnel0 up > > [root@TestLinux root]# ip addr add 192.168.2.4/24 dev tunnel0 > > [root@TestLinux root]# ip route add 192.168.2.0/24 dev tunnel0 > > RTNETLINK answers: File exists > > [root@TestLinux root]# ip link set dev tunnel0 multicast on > > > > > 1) I do not know what 'RTNETLINK answers: File exists' mean beside maybe > that the route was automatically created.? I created the route though the > tunnel before and this message never came up before. > > > > [root@TestLinux root]# ip addr ls > > 1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue > > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 > > inet 127.0.0.1/8 scope host lo > > 2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc htb qlen 1000 > > link/ether 00:02:a5:df:01:d9 brd ff:ff:ff:ff:ff:ff > > inet 20.0.0.249/24 brd 20.0.0.255 scope global eth0 > > 3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc htb qlen 1000 > > link/ether 00:0d:88:2d:94:80 brd ff:ff:ff:ff:ff:ff > > inet 10.0.50.1/24 brd 10.0.50.255 scope global eth1 > > 4: gre0: <NOARP> mtu 1476 qdisc noop > > link/gre 0.0.0.0 brd 0.0.0.0 > > 5: tunnel0@NONE: <POINTOPOINT,MULTICAST,NOARP,UP> mtu 1476 qdisc noqueue > > link/gre 20.0.0.249 peer 20.0.0.250 > > inet 192.168.2.4/24 scope global tunnel0 > > > > 2) Where did 'gre0' come from? This leads me to belive all of my traffic are > going thought this interface. > > > > > > > zebra-TestLinux# show interface > > Interface eth0 is up, line protocol detection is disabled > > index 2 metric 1 mtu 1500 <UP,BROADCAST,RUNNING,MULTICAST> > > HWaddr: 00:02:a5:df:01:d9 > > inet 20.0.0.249/24 broadcast 20.0.0.255 > > input packets 13724, bytes 872184, dropped 0, multicast packets 0 > > input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0 > > output packets 19637, bytes 2395991, dropped 0 > > output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0 > > collisions 41 > > Interface eth1 is up, line protocol detection is disabled > > index 3 metric 1 mtu 1500 <UP,BROADCAST,MULTICAST> > > HWaddr: 00:0d:88:2d:94:80 > > inet 10.0.50.1/24 broadcast 10.0.50.255 > > input packets 0, bytes 0, dropped 0, multicast packets 0 > > input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0 > > output packets 13, bytes 828, dropped 0 > > output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0 > > collisions 0 > > Interface gre0 is down > > index 4 metric 1 mtu 1476 <NOARP> > > input packets 0, bytes 0, dropped 0, multicast packets 0 > > input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0 > > output packets 0, bytes 0, dropped 0 > > output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0 > > collisions 0 > > Interface lo is up, line protocol detection is disabled > > index 1 metric 1 mtu 16436 <UP,LOOPBACK,RUNNING> > > inet 127.0.0.1/8 > > input packets 2098, bytes 2234827, dropped 0, multicast packets 0 > > input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0 > > output packets 2098, bytes 2234827, dropped 0 > > output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0 > > collisions 0 > > Interface tunnel0 is up, line protocol detection is disabled > > index 5 metric 1 mtu 1476 <UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> > > inet 192.168.2.4/24 pointopoint 192.168.2.4 > > input packets 0, bytes 0, dropped 0, multicast packets 0 > > input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0 > > output packets 0, bytes 0, dropped 0 > > output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0 > > > collisions 0 > > > > rip-TestLinix# show ip rip > > Codes: R - RIP, C - connected, S - Static, O - OSPF, B - BGP > > Sub-codes: > > (n) - normal, (s) - static, (d) - default, (r) - redistribute, > > (i) - interface > > > > Network Next Hop Metric From Tag Time > > C(i) 10.0.50.0/24 0.0.0.0 1 self 0 > > > C(i) 192.168.2.0/24 0.0.0.0 1 self 0 > > > > rip-TestLinix# show ip rip status > > Routing Protocol is "rip" > > Sending updates every 30 seconds with +/-50%, next due in 6 seconds > > Timeout after 180 seconds, garbage collect after 120 seconds > > Outgoing update filter list for all interface is not set > > Incoming update filter list for all interface is not set > > Default redistribution metric is 1 > > Redistributing: > > Default version control: send version 2, receive version 2 > > Interface Send Recv Key-chain > > eth1 2 2 > > tunnel0 2 2 > > Routing for Networks: > > 10.0.50.0/24 > > 192.168.2.0/24 > > Routing Information Sources: > > Gateway BadPackets BadRoutes Distance Last Update > > > Distance: (default is 120) > > > > [root@TestLinux root]# ip -s link ls tunnel0 > > 5: tunnel0@NONE: <POINTOPOINT,MULTICAST,NOARP,UP> mtu 1476 qdisc noqueue > > link/gre 20.0.0.249 peer 20.0.0.250 > > RX: bytes packets errors dropped overrun mcast > > 672 8 0 0 0 0 > > TX: bytes packets errors dropped carrier collsns > > 864 8 0 0 0 0 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
