On 01/04/2011 02:34 PM, Jesse Gross wrote:
On Thu, Dec 30, 2010 at 6:00 PM, Frank<fr...@cloud.com> wrote:
Hi guys:
I just try to create two GRE tunnels between two hosts, the result is I
can't do this.
vswitch complains "could not create iface test: File exists" when
creating second tunnel.
I did set different GRE keys for tunnels.
I google and get some articles said it's possible to create multiple GRE
tunnels with same src/dst.
I am curious what technical barrier prevents our doing since GRE key is
an natural tag to distinguish different tunnels.
You can have multiple tunnels between the same endpoints if they are
distinguished by key. Please post your interface config.
I am sorry for late reply. I create tunnels as below (ovs is alias of
ovs-vsctl):
[root@xenserver-frank4 ~]# ovs list interface 1-2
_uuid : ebc0d114-d258-4670-9965-8a5a0491b0b9
external_ids : {}
ingress_policing_burst: 0
ingress_policing_rate: 0
mac : []
name : "1-2"
ofport : 8
options : {remote_ip="192.168.152.22 key=1"}
statistics : {collisions=0, rx_bytes=894703, rx_crc_err=0,
rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0,
rx_packets=12083, tx_bytes=28882506, tx_dropped=0, tx_errors=0,
tx_packets=21760}
status : {}
type : gre
[root@xenserver-frank4 ~]# ovs create interface name=test
options:"remote_ip=192.168.152.22 key=2"
74c1e2e3-da43-4ae4-86e7-048de205f974
[root@xenserver-frank4 ~]# ovs create port name=test
interfaces=[74c1e2e3-da43-4ae4-86e7-048de205f974]
3dc08a5c-102c-45c6-9891-9692d2d4a8e3
[root@xenserver-frank4 ~]# ovs add bridge xapi7 ports
3dc08a5c-102c-45c6-9891-9692d2d4a8e3
[root@xenserver-frank4 ~]# ovs list interface test
_uuid : 74c1e2e3-da43-4ae4-86e7-048de205f974
external_ids : {}
ingress_policing_burst: 0
ingress_policing_rate: 0
mac : []
name : test
ofport : []
options : {remote_ip="192.168.152.22 key=2"}
statistics : {}
status : {}
type : ""
Actually I already had a tunnel to "192.168.152.22" with key = 1. we can
see the secondary creation was failed even I set the key=2.
In ovs-vswitchd.log, here are:
Jan 13 14:18:31|02259|netdev|WARN|failed to get flags for network device
test: No such device
Jan 13 14:18:31|02260|bridge|WARN|could not create iface test: No such
device
Jan 13 14:18:31|02261|bridge|WARN|bridge xapi7: port test has no
interfaces, dropping
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