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Re: [uml-user] Configuring GRE tunnel between Ubuntu and UML
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From: madhusudan r <mad...@ya...> - 2013-07-03 03:44:02
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I found the answer to this, posting it for others' benefit. The configuration is as follows, but the parameters vary depending on the mode in which the GRE needs to work on UML/Ubuntu: 1. Boot-up UML with GRE enabled ./vmlinux ubd0=guest3,uml-ext2-img con0=null con=fd:0,fd:1 umid=guest3 mem=32m eth0=tapng,,tap1 eth1=gre,,10.0.0.1,10.0.0.2,0x0,0x0,0x9 cgroup_disable=memory init=/etc/preinit 2. Configure a 'Ethernet over GRE' tunnel on Ubuntu #sudo ip link add gt0 type gretap remote <IP> local <IP> [csum] [seq] #sudo ip addr add 10.20.30.70/24 dev gt0 #sudo ip link set gt0 up With everything in between them working, the systems will now be able to talk over GRE. ________________________________ From: madhusudan r <mad...@ya...> To: "use...@li..." <use...@li...> Sent: Friday, 28 June 2013 12:12 PM Subject: [uml-user] Configuring GRE tunnel between Ubuntu and UML Hi, I'm trying to setup a GRE tunnel between an Ubuntu system and a UML (running on a different system). This is how the systems were configured: 1. UML Boot arguments: ./vmlinux ubd0=guest3,uml-ext2-img con0=null con=fd:0,fd:1 umid=guest3 mem=32m eth0=tapng,,tap1 eth1=gre,,10.0.0.1,10.0.0.2,9 cgroup_disable=memory init=/etc/preinit root@OpenWrt:/# ifconfig eth0 Link encap:Ethernet HWaddr 5A:86:C4:0D:19:F5 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:43 errors:0 dropped:22 overruns:0 frame:0 TX packets:777 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2321 (2.2 KiB) TX bytes:312354 (305.0 KiB) Interrupt:5 eth1 Link encap:Ethernet HWaddr 76:5A:7B:B7:D9:F6 inet addr:192.168.252.1 Bcast:192.168.252.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:611 errors:0 dropped:611 overruns:0 frame:0 TX packets:1 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:42518 (41.5 KiB) TX bytes:402 (402.0 B) Interrupt:5 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) 2. Ubuntu This is the entry I added to /etc/network/interfaces: auto gre1 iface gre1 inet static address 192.168.252.110 netmask 255.255.255.252 pre-up iptunnel add gre1 mode gre local 10.0.0.1 remote 10.0.0.2 ttl 255 up ifconfig gre1 multicast pointtopoint 192.168.252.1 post-down iptunnel del gre1 ubuntu# ifconfig eth0 Link encap:Ethernet HWaddr 78:e7:d1:c6:23:71 inet addr:10.0.0.1 Bcast:10.78.49.255 Mask:255.255.255.0 inet6 addr: fe80::7ae7:d1ff:fec6:2371/64 Scope:Link inet6 addr: 2001:220:abcd::20/64 Scope:Global inet6 addr: 2001:220:abcd:70::26/64 Scope:Global UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3331 errors:0 dropped:284 overruns:0 frame:0 TX packets:543 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1200307 (1.2 MB) TX bytes:114051 (114.0 KB) Interrupt:17 gre1 Link encap:UNSPEC HWaddr 0A-4E-31-4B-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:192.168.252.110 P-t-P:192.168.252.110 Mask:255.255.255.252 inet6 addr: fe80::5efe:a4e:314b/64 Scope:Link UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1476 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:3 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:168 (168.0 B) The ubuntu box is able to ping the IP 192.168.252.1, but strangely I don't see packets going out to 10.0.0.2. Also, the UML is not able to ping 192.168.252.110. Is this configuration correct or is there something missing? Thanks! ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ User-mode-linux-user mailing list Use...@li... https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user |