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gerrit.nordix.org / fdio / vpp / 2f10886a7173f10a09c631b017afd178a4c32c5c / . / docs / usecases / Routing.rst
blob: 31929d31603215e5e3aca41dd0ee078c197736e2 [file] [log] [blame]
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]1.. _Routing:
2
3.. toctree::
4
5Connecting the two Containers
6_____________________________
7
8Now for connecting these two linux containers to VPP and pinging between them.
9
10Enter container *cone*, and check the current network configuration:
11
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]12.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]13
14 root@cone:/# ip -o a
15 1: lo inet 127.0.0.1/8 scope host lo\ valid_lft forever preferred_lft forever
16 1: lo inet6 ::1/128 scope host \ valid_lft forever preferred_lft forever
17 30: veth0 inet 10.0.3.157/24 brd 10.0.3.255 scope global veth0\ valid_lft forever preferred_lft forever
18 30: veth0 inet6 fe80::216:3eff:fee2:d0ba/64 scope link \ valid_lft forever preferred_lft forever
19 32: veth_link1 inet6 fe80::2c9d:83ff:fe33:37e/64 scope link \ valid_lft forever preferred_lft forever
20
21You can see that there are three network interfaces, *lo, veth0*, and *veth_link1*.
22
23Notice that *veth_link1* has no assigned IP.
24
25Check if the interfaces are down or up:
26
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]27.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]28
29 root@cone:/# ip link
30 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
31 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
32 30: veth0@if31: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
33 link/ether 00:16:3e:e2:d0:ba brd ff:ff:ff:ff:ff:ff link-netnsid 0
34 32: veth_link1@if33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
35 link/ether 2e:9d:83:33:03:7e brd ff:ff:ff:ff:ff:ff link-netnsid 0
36
37.. _networkNote:
38
39.. note::
40
41 Take note of the network index for **veth_link1**. In our case, it 32, and its parent index (the host machine, not the containers) is 33, shown by **veth_link1@if33**. Yours will most likely be different, but **please take note of these index's**.
42
43Make sure your loopback interface is up, and assign an IP and gateway to veth_link1.
44
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]45.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]46
47 root@cone:/# ip link set dev lo up
48 root@cone:/# ip addr add 172.16.1.2/24 dev veth_link1
49 root@cone:/# ip link set dev veth_link1 up
50 root@cone:/# dhclient -r
51 root@cone:/# ip route add default via 172.16.1.1 dev veth_link1
52
53Here, the IP is 172.16.1.2/24 and the gateway is 172.16.1.1.
54
55Run some commands to verify the changes:
56
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]57.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]58
59 root@cone:/# ip -o a
60 1: lo inet 127.0.0.1/8 scope host lo\ valid_lft forever preferred_lft forever
61 1: lo inet6 ::1/128 scope host \ valid_lft forever preferred_lft forever
62 30: veth0 inet6 fe80::216:3eff:fee2:d0ba/64 scope link \ valid_lft forever preferred_lft forever
63 32: veth_link1 inet 172.16.1.2/24 scope global veth_link1\ valid_lft forever preferred_lft forever
64 32: veth_link1 inet6 fe80::2c9d:83ff:fe33:37e/64 scope link \ valid_lft forever preferred_lft forever
65
66 root@cone:/# route
67 Kernel IP routing table
68 Destination Gateway Genmask Flags Metric Ref Use Iface
69 default 172.16.1.1 0.0.0.0 UG 0 0 0 veth_link1
70 172.16.1.0 * 255.255.255.0 U 0 0 0 veth_link1
71
72
73We see that the IP has been assigned, as well as our default gateway.
74
75Now exit this container and repeat this process with container *ctwo*, except with IP 172.16.2.2/24 and gateway 172.16.2.1.
76
77
Paul Vinciguerra7fa3dd22019-10-27 17:28:10 -0400[diff] [blame]78After that's done for *both* containers, exit from the container if you're in one:
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]79
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]80.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]81
82 root@ctwo:/# exit
83 exit
84 root@localhost:~#
85
86In the machine running the containers, run **ip link** to see the host *veth* network interfaces, and their link with their respective *container veth's*.
87
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]88.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]89
90 root@localhost:~# ip link
91 1: lo: <LOOPBACK> mtu 65536 qdisc noqueue state DOWN mode DEFAULT group default qlen 1
92 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
93 2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
94 link/ether 08:00:27:33:82:8a brd ff:ff:ff:ff:ff:ff
95 3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
96 link/ether 08:00:27:d9:9f:ac brd ff:ff:ff:ff:ff:ff
97 4: enp0s9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
98 link/ether 08:00:27:78:84:9d brd ff:ff:ff:ff:ff:ff
99 5: lxcbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
100 link/ether 00:16:3e:00:00:00 brd ff:ff:ff:ff:ff:ff
101 19: veth0C2FL7@if18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master lxcbr0 state UP mode DEFAULT group default qlen 1000
102 link/ether fe:0d:da:90:c1:65 brd ff:ff:ff:ff:ff:ff link-netnsid 1
103 21: veth8NA72P@if20: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
104 link/ether fe:1c:9e:01:9f:82 brd ff:ff:ff:ff:ff:ff link-netnsid 1
105 31: vethXQMY4C@if30: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master lxcbr0 state UP mode DEFAULT group default qlen 1000
106 link/ether fe:9a:d9:29:40:bb brd ff:ff:ff:ff:ff:ff link-netnsid 0
107 33: vethQL7KOC@if32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
108 link/ether fe:ed:89:54:47:a2 brd ff:ff:ff:ff:ff:ff link-netnsid 0
109
110
111Remember our network interface index 32 in *cone* from this :ref:`note <networkNote>`? We can see at the bottom the name of the 33rd index **vethQL7KOC@if32**. Keep note of this network interface name for the veth connected to *cone* (ex. vethQL7KOC), and the other network interface name for *ctwo*.
112
113With VPP in the host machine, show current VPP interfaces:
114
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]115.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]116
117 root@localhost:~# vppctl show inter
118 Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
119 local0 0 down 0/0/0/0
120
121Which should only output local0.
122
123Based on the names of the network interfaces discussed previously, which are specific to my systems, we can create VPP host-interfaces:
124
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]125.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]126
127 root@localhost:~# vppctl create host-interface name vethQL7K0C
128 root@localhost:~# vppctl create host-interface name veth8NA72P
129
130Verify they have been set up properly:
131
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]132.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]133
134 root@localhost:~# vppctl show inter
135 Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
136 host-vethQL7K0C 1 down 9000/0/0/0
137 host-veth8NA72P 2 down 9000/0/0/0
138 local0 0 down 0/0/0/0
139
140Which should output *three network interfaces*, local0, and the other two host network interfaces linked to the container veth's.
141
142
143Set their state to up:
144
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]145.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]146
147 root@localhost:~# vppctl set interface state host-vethQL7K0C up
148 root@localhost:~# vppctl set interface state host-veth8NA72P up
149
150Verify they are now up:
151
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]152.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]153
154 root@localhost:~# vppctl show inter
155 Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
156 host-vethQL7K0C 1 up 9000/0/0/0
157 host-veth8NA72P 2 up 9000/0/0/0
158 local0 0 down 0/0/0/0
159
160
161Add IP addresses for the other end of each veth link:
162
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]163.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]164
165 root@localhost:~# vppctl set interface ip address host-vethQL7K0C 172.16.1.1/24
166 root@localhost:~# vppctl set interface ip address host-veth8NA72P 172.16.2.1/24
167
168
169Verify the addresses are set properly by looking at the L3 table:
170
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]171.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]172
173 root@localhost:~# vppctl show inter addr
174 host-vethQL7K0C (up):
175 L3 172.16.1.1/24
176 host-veth8NA72P (up):
177 L3 172.16.2.1/24
178 local0 (dn):
179
180Or looking at the FIB by doing:
181
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]182.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]183
184 root@localhost:~# vppctl show ip fib
185 ipv4-VRF:0, fib_index:0, flow hash:[src dst sport dport proto ] locks:[src:plugin-hi:2, src:default-route:1, ]
186 0.0.0.0/0
187 unicast-ip4-chain
188 [@0]: dpo-load-balance: [proto:ip4 index:1 buckets:1 uRPF:0 to:[0:0]]
189 [0] [@0]: dpo-drop ip4
190 0.0.0.0/32
191 unicast-ip4-chain
192 [@0]: dpo-load-balance: [proto:ip4 index:2 buckets:1 uRPF:1 to:[0:0]]
193 [0] [@0]: dpo-drop ip4
194 172.16.1.0/32
195 unicast-ip4-chain
196 [@0]: dpo-load-balance: [proto:ip4 index:10 buckets:1 uRPF:9 to:[0:0]]
197 [0] [@0]: dpo-drop ip4
198 172.16.1.0/24
199 unicast-ip4-chain
200 [@0]: dpo-load-balance: [proto:ip4 index:9 buckets:1 uRPF:8 to:[0:0]]
201 [0] [@4]: ipv4-glean: host-vethQL7K0C: mtu:9000 ffffffffffff02fec953f98c0806
202 172.16.1.1/32
203 unicast-ip4-chain
204 [@0]: dpo-load-balance: [proto:ip4 index:12 buckets:1 uRPF:13 to:[0:0]]
205 [0] [@2]: dpo-receive: 172.16.1.1 on host-vethQL7K0C
206 172.16.1.255/32
207 unicast-ip4-chain
208 [@0]: dpo-load-balance: [proto:ip4 index:11 buckets:1 uRPF:11 to:[0:0]]
209 [0] [@0]: dpo-drop ip4
210 172.16.2.0/32
211 unicast-ip4-chain
212 [@0]: dpo-load-balance: [proto:ip4 index:14 buckets:1 uRPF:15 to:[0:0]]
213 [0] [@0]: dpo-drop ip4
214 172.16.2.0/24
215 unicast-ip4-chain
216 [@0]: dpo-load-balance: [proto:ip4 index:13 buckets:1 uRPF:14 to:[0:0]]
217 [0] [@4]: ipv4-glean: host-veth8NA72P: mtu:9000 ffffffffffff02fe305400e80806
218 172.16.2.1/32
219 unicast-ip4-chain
220 [@0]: dpo-load-balance: [proto:ip4 index:16 buckets:1 uRPF:19 to:[0:0]]
221 [0] [@2]: dpo-receive: 172.16.2.1 on host-veth8NA72P
222 172.16.2.255/32
223 unicast-ip4-chain
224 [@0]: dpo-load-balance: [proto:ip4 index:15 buckets:1 uRPF:17 to:[0:0]]
225 [0] [@0]: dpo-drop ip4
226 224.0.0.0/4
227 unicast-ip4-chain
228 [@0]: dpo-load-balance: [proto:ip4 index:4 buckets:1 uRPF:3 to:[0:0]]
229 [0] [@0]: dpo-drop ip4
230 240.0.0.0/4
231 unicast-ip4-chain
232 [@0]: dpo-load-balance: [proto:ip4 index:3 buckets:1 uRPF:2 to:[0:0]]
233 [0] [@0]: dpo-drop ip4
234 255.255.255.255/32
235 unicast-ip4-chain
236 [@0]: dpo-load-balance: [proto:ip4 index:5 buckets:1 uRPF:4 to:[0:0]]
237 [0] [@0]: dpo-drop ip4
238
239At long last you probably want to see some pings:
240
andrewdf50b452018-08-09 13:23:59 -0400[diff] [blame]241.. code-block:: console
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]242
243 root@localhost:~# lxc-attach -n cone -- ping -c3 172.16.2.2
244 PING 172.16.2.2 (172.16.2.2) 56(84) bytes of data.
245 64 bytes from 172.16.2.2: icmp_seq=1 ttl=63 time=0.102 ms
246 64 bytes from 172.16.2.2: icmp_seq=2 ttl=63 time=0.189 ms
247 64 bytes from 172.16.2.2: icmp_seq=3 ttl=63 time=0.150 ms
248
249 --- 172.16.2.2 ping statistics ---
250 3 packets transmitted, 3 received, 0% packet loss, time 1999ms
251 rtt min/avg/max/mdev = 0.102/0.147/0.189/0.035 ms
252
253 root@localhost:~# lxc-attach -n ctwo -- ping -c3 172.16.1.2
254 PING 172.16.1.2 (172.16.1.2) 56(84) bytes of data.
255 64 bytes from 172.16.1.2: icmp_seq=1 ttl=63 time=0.111 ms
256 64 bytes from 172.16.1.2: icmp_seq=2 ttl=63 time=0.089 ms
257 64 bytes from 172.16.1.2: icmp_seq=3 ttl=63 time=0.096 ms
258
259 --- 172.16.1.2 ping statistics ---
260 3 packets transmitted, 3 received, 0% packet loss, time 1998ms
261 rtt min/avg/max/mdev = 0.089/0.098/0.111/0.014 ms
262
263
Paul Vinciguerra7fa3dd22019-10-27 17:28:10 -0400[diff] [blame]264Which should send/receive three packets for each command.
John DeNisco06dcd452018-07-26 12:45:10 -0400[diff] [blame]265
Paul Vinciguerra7fa3dd22019-10-27 17:28:10 -0400[diff] [blame]266This is the end of this guide. Great work!