[ovs-discuss] DHCP request can't be received by ovs when I'm using GRE
Li, Chen
chen.li at intel.com
Thu Jan 9 02:03:10 UTC 2014
Sorry, I’m really new to openvswitch.
Can you more specific ??
I don’t have the command…….
ovs-ctl
-bash: ovs-ctl: command not found
Thanks.
-chen
From: Joe Talerico [mailto:jtaleric at redhat.com]
Sent: Wednesday, January 08, 2014 11:57 PM
To: Li, Chen
Cc: discuss at openvswitch.org
Subject: Re: [ovs-discuss] DHCP request can't be received by ovs when I'm using GRE
Make sure iptables is aware of the GRE tunneling.
http://openvswitch.org/cgi-bin/ovsman.cgi?page=utilities/ovs-ctl.8#The ‘‘enable−protocol’’ command<http://openvswitch.org/cgi-bin/ovsman.cgi?page=utilities/ovs-ctl.8#The%20%E2%80%98%E2%80%98enable%E2%88%92protocol%E2%80%99%E2%80%99%20command>
Joe
On Jan 7, 2014, at 9:39 PM, Li, Chen <chen.li at intel.com<mailto:chen.li at intel.com>> wrote:
Hi list,
I'm working under Centos 6.4 + Openvswitch 1.11.0_8ce28d-1.el6ost + Openstack Havana.
While, I have two nodes.
One is compute node, with an active instance, and the instance keep send out DHCP request out, try to get an IP address.
Another is network node, it will start dnsmasq process.
Instance should get IP from the dnsmasq process in theory.
But unfortunately, this operation failed.
In the network node’s physical NIC port, using tcpdump command, I can get:
10:11:11.416293 IP 192.101.11.101 > 192.101.11.201: GREv0, key=0x1, length 350: IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:06:49:b1 (oui Unknown), length 300
10:11:11.416347 IP 192.101.11.201 > 192.101.11.101: ICMP host 192.101.11.201 unreachable - admin prohibited, length 378
And I can’t get anything from “ovs-dpctl dump-flows”.
Not sure if I just missed all of them or they really not received by ovs.
Looks like the DHCP request can’t be processed at the network node.
Because dhcp agent actually just create an interface on ovs bridge br-int, and start dnsmasq based on that port, they’re much behind.
So, I think this might not related to dhcp agent (openstack) .
Anyone have any ideas about why this happened ??
Thanks.
-chen
Configuration on Network Node:
ovs-vsctl show
34e0c8b4-315c-42c5-9d7d-183d3a6fbd83
Bridge br-int
Port br-int
Interface br-int
type: internal
Port patch-tun
Interface patch-tun
type: patch
options: {peer=patch-int}
Port "tap0b4cf11c-29"
tag: 2
Interface "tap0b4cf11c-29"
Port "tap45bfc42b-93"
tag: 1
Interface "tap45bfc42b-93"
Bridge br-tun
Port "vxlan-192.101.11.102"
Interface "vxlan-192.101.11.102"
type: vxlan
options: {dst_port="8472", in_key=flow, local_ip="192.101.11.201", out_key=flow, remote_ip="192.101.11.102"}
Port br-tun
Interface br-tun
type: internal
Port "vxlan-192.101.11.101"
Interface "vxlan-192.101.11.101"
type: vxlan
options: {dst_port="8472", in_key=flow, local_ip="192.101.11.201", out_key=flow, remote_ip="192.101.11.101"}
Port "gre-192.101.11.102"
Interface "gre-192.101.11.102"
type: gre
options: {in_key=flow, local_ip="192.101.11.201", out_key=flow, remote_ip="192.101.11.102"}
Port patch-int
Interface patch-int
type: patch
options: {peer=patch-tun}
Port "gre-192.101.11.101"
Interface "gre-192.101.11.101"
type: gre
options: {in_key=flow, local_ip="192.101.11.201", out_key=flow, remote_ip="192.101.11.101"}
ovs-ofctl dump-flows br-int
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=2305.835s, table=0, n_packets=2, n_bytes=160, idle_age=2302, priority=2,in_port=6 actions=drop
cookie=0x0, duration=2305.517s, table=0, n_packets=1, n_bytes=70, idle_age=2302, priority=2,in_port=5 actions=drop
cookie=0x0, duration=2319.056s, table=0, n_packets=99, n_bytes=10554, idle_age=23, priority=1 actions=NORMAL
(But, port 5 & 6 do not exist)
ovs-vsctl get Interface br-int ofport
65534
ovs-vsctl get Interface patch-tun ofport
2
ovs-vsctl get Interface tap0b4cf11c-29 ofport
4
ovs-vsctl get Interface tap45bfc42b-93 ofport
1
ovs-ofctl dump-flows br-tun (I don’t really understand what these rules means….. ☹)
NXST_FLOW reply (xid=0x4):
cookie=0x0, duration=2463.775s, table=0, n_packets=0, n_bytes=0, idle_age=2463, priority=1,in_port=3 actions=resubmit(,3)
cookie=0x0, duration=2460.413s, table=0, n_packets=0, n_bytes=0, idle_age=2460, priority=1,in_port=7 actions=resubmit(,3)
cookie=0x0, duration=2459.222s, table=0, n_packets=0, n_bytes=0, idle_age=2459, priority=1,in_port=8 actions=resubmit(,2)
cookie=0x0, duration=2456.564s, table=0, n_packets=0, n_bytes=0, idle_age=2456, priority=1,in_port=11 actions=resubmit(,2)
cookie=0x0, duration=2466.384s, table=0, n_packets=49, n_bytes=5090, idle_age=177, priority=1,in_port=1 actions=resubmit(,1)
cookie=0x0, duration=2458.316s, table=0, n_packets=0, n_bytes=0, idle_age=2458, priority=1,in_port=9 actions=resubmit(,2)
cookie=0x0, duration=2457.436s, table=0, n_packets=0, n_bytes=0, idle_age=2457, priority=1,in_port=10 actions=resubmit(,2)
cookie=0x0, duration=2462.082s, table=0, n_packets=0, n_bytes=0, idle_age=2462, priority=1,in_port=5 actions=resubmit(,3)
cookie=0x0, duration=2461.216s, table=0, n_packets=0, n_bytes=0, idle_age=2461, priority=1,in_port=6 actions=resubmit(,3)
cookie=0x0, duration=2464.603s, table=0, n_packets=50, n_bytes=5464, idle_age=172, priority=1,in_port=2 actions=resubmit(,3)
cookie=0x0, duration=2462.945s, table=0, n_packets=0, n_bytes=0, idle_age=2462, priority=1,in_port=4 actions=resubmit(,3)
cookie=0x0, duration=2466.288s, table=0, n_packets=4, n_bytes=300, idle_age=2457, priority=0 actions=drop
cookie=0x0, duration=2466.201s, table=1, n_packets=40, n_bytes=4384, idle_age=177, priority=0,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,20)
cookie=0x0, duration=2466.114s, table=1, n_packets=9, n_bytes=706, idle_age=2454, priority=0,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=resubmit(,21)
cookie=0x0, duration=2460.981s, table=2, n_packets=0, n_bytes=0, idle_age=2460, priority=1,tun_id=0x1 actions=mod_vlan_vid:1,resubmit(,10)
cookie=0x0, duration=2466.025s, table=2, n_packets=0, n_bytes=0, idle_age=2466, priority=0 actions=drop
cookie=0x0, duration=2460.836s, table=3, n_packets=50, n_bytes=5464, idle_age=172, priority=1,tun_id=0x3 actions=mod_vlan_vid:2,resubmit(,10)
cookie=0x0, duration=2465.928s, table=3, n_packets=0, n_bytes=0, idle_age=2465, priority=0 actions=drop
cookie=0x0, duration=2465.841s, table=10, n_packets=50, n_bytes=5464, idle_age=172, priority=1 actions=learn(table=20,hard_timeout=300,priority=1,NXM_OF_VLAN_TCI[0..11],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],load:0->NXM_OF_VLAN_TCI[],load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[],output:NXM_OF_IN_PORT[]),output:1
cookie=0x0, duration=183.629s, table=20, n_packets=40, n_bytes=4384, hard_timeout=300, idle_age=177, hard_age=171, priority=1,vlan_tci=0x0002/0x0fff,dl_dst=fa:16:3e:25:a8:02 actions=load:0->NXM_OF_VLAN_TCI[],load:0x3->NXM_NX_TUN_ID[],output:2
cookie=0x0, duration=2465.755s, table=20, n_packets=0, n_bytes=0, idle_age=2465, priority=0 actions=resubmit(,21)
cookie=0x0, duration=2460.923s, table=21, n_packets=0, n_bytes=0, idle_age=2460, priority=1,dl_vlan=2 actions=strip_vlan,set_tunnel:0x3,output:4,output:5,output:7,output:3,output:2,output:6
cookie=0x0, duration=2459.122s, table=21, n_packets=0, n_bytes=0, idle_age=2459, hard_age=2456, priority=1,dl_vlan=1 actions=strip_vlan,set_tunnel:0x1,output:11,output:9,output:8,output:10
cookie=0x0, duration=2465.662s, table=21, n_packets=9, n_bytes=706, idle_age=2454, priority=0 actions=drop
ovs-vsctl get Interface "vxlan-192.101.11.102" ofport
3
ovs-vsctl get Interface br-tun ofport
65534
ovs-vsctl get Interface "vxlan-192.101.11.101" ofport
2
ovs-vsctl get Interface "gre-192.101.11.102" ofport
9
ovs-vsctl get Interface patch-int ofport
1
ovs-vsctl get Interface "gre-192.101.11.101" ofport
8
ovs-dpctl show
ystem at ovs-system:
lookups: hit:2112 missed:5510 lost:0
flows: 0
port 0: ovs-system (internal)
port 1: br-int (internal)
port 2: br-tun (internal)
port 3: tap45bfc42b-93
port 4: vxlan_sys_8472 (vxlan: df_default=false, ttl=0)
port 6: tap0b4cf11c-29
port 8: gre_system (gre: df_default=false, ttl=0)
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