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Add example for Switch NI with multiple ports
Switch network instance with multiple ports allows to: * bridge multiple switches and add redundant links. STP is used to avoid bridge loops. * connect end-devices into the same L2 segment as applications running on the edge node. Signed-off-by: Milan Lenco <[email protected]>
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| # SDN Example with Switch Network Instance using multiple ports | ||
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| Switch network instance with multiple ports allows to: | ||
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| * bridge multiple switches and add redundant links. STP is used to avoid bridge loops. | ||
| * connect end-devices into the same L2 segment as applications running on the edge node. | ||
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| User is able to use shared-label to select multiple network ports for a Switch Network Instance. | ||
| EVE automatically runs the Spanning Tree Protocol (STP) for bridge with multiple ports to avoid | ||
| bridge loops and broadcast storms. User is able to enable BPDU guard on ports that are supposed | ||
| to connect end-devices and therefore are not expected to participate in the STP algorithm. | ||
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| With VLAN-enabled Switch NI, the user is able to use a physical network port attached | ||
| to Switch NI as a VLAN access port (by default all switch NI ports are configured as trunks). | ||
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| ## Example 1: Switch NI with redundant links | ||
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| In this example, we connect application into a single switch instance with 2 ports | ||
| connected into the same L2 segment. Spanning Tree Protocol will pick one of these redundant | ||
| links for forwarding while it will block the other one. If the active link goes down, | ||
| STP will re-converge. The blocked port will transition from the Blocking state to | ||
| the Forwarding state, effectively allowing traffic to flow through the previously | ||
| redundant link. | ||
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| Here is a diagram depicting the network topology: | ||
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| ```text | ||
| +-----------------+ | ||
| | eth0 (EVE mgmt) |---------------------------- | ||
| | (DHCP) | | | ||
| +-----------------+ | | ||
| | | ||
| +-----+ +----------+ +-------------------+ | | ||
| | app |-->| Switch NI |-->| eth1 (app-shared) | +--------+ +--------+ +------------+ | ||
| +-----+ +----------+ | (No IP, L2-only) |------| switch |------| router |---| httpserver | | ||
| | +-------------------+ +--------+ +--------+ +------------+ | ||
| | | | ||
| | +-------------------+ | | ||
| ----------->| eth2 (app-shared) |------------ | ||
| | (No IP, L2-only) | | ||
| +-------------------+ | ||
| ``` | ||
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| Run the example with: | ||
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| ```shell | ||
| make clean && make build-tests | ||
| ./eden config add default | ||
| ./eden config set default --key sdn.disable --value false | ||
| ./eden setup --eve-bootstrap-file $(pwd)/sdn/examples/switch-ni-multiple-ports/redundant-links/device-config.json | ||
| ./eden start --sdn-network-model $(pwd)/sdn/examples/switch-ni-multiple-ports/redundant-links/network-model.json | ||
| ./eden eve onboard | ||
| ./eden controller edge-node set-config --file $(pwd)/sdn/examples/switch-ni-multiple-ports/redundant-links/device-config.json | ||
| ``` | ||
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| Once deployed, check that the bridge is created, runs STP and contains both eth1 and eth2: | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ brctl showstp bn1 | ||
| bn1 | ||
| bridge id 8000.00163e060001 | ||
| designated root 8000.00163e060001 | ||
| root port 0 path cost 0 | ||
| max age 20.00 bridge max age 20.00 | ||
| hello time 2.00 bridge hello time 2.00 | ||
| forward delay 15.00 bridge forward delay 15.00 | ||
| ageing time 300.00 | ||
| hello timer 1.62 tcn timer 0.00 | ||
| topology change timer 0.00 gc timer 41.52 | ||
| flags | ||
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| nbu1x1 (3) | ||
| port id 8003 state forwarding | ||
| designated root 8000.00163e060001 path cost 100 | ||
| designated bridge 8000.00163e060001 message age timer 0.00 | ||
| designated port 8003 forwrd delay timer 0.00 | ||
| designated cost 0 hold timer 0.62 | ||
| flags | ||
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| eth1 (2) | ||
| port id 8002 state forwarding | ||
| designated root 8000.00163e060001 path cost 100 | ||
| designated bridge 8000.00163e060001 message age timer 0.00 | ||
| designated port 8002 forward delay timer 0.00 | ||
| designated cost 0 hold timer 0.62 | ||
| flags | ||
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| eth2 (1) | ||
| port id 8001 state forwarding | ||
| designated root 8000.00163e060001 path cost 100 | ||
| designated bridge 8000.00163e060001 message age timer 0.00 | ||
| designated port 8001 forward delay timer 0.00 | ||
| designated cost 0 hold timer 0.62 | ||
| flags | ||
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| ``` | ||
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| In this case, `bridge id` and `designated root` show the same values, meaning | ||
| that this is a STP root bridge and all ports are thus in the Forwarding state. | ||
| To avoid bridge loops, the opposite bridge, running inside Eden-SDN must therefore | ||
| block one of the ports: | ||
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| ```shell | ||
| ./eden sdn ssh | ||
| sdn$ brctl showstp br-bridge1 | ||
| br-bridge1 | ||
| bridge id 8000.02fdb51b8701 | ||
| designated root 8000.00163e060001 | ||
| root port 2 path cost 4 | ||
| max age 20.00 bridge max age 20.00 | ||
| hello time 2.00 bridge hello time 2.00 | ||
| forward delay 15.00 bridge forward delay 15.00 | ||
| ageing time 300.00 | ||
| hello timer 0.00 tcn timer 0.00 | ||
| topology change timer 0.00 gc timer 54.73 | ||
| flags | ||
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| net-br-out-yCqC (3) | ||
| port id 8003 state forwarding | ||
| designated root 8000.00163e060001 path cost 2 | ||
| designated bridge 8000.02fdb51b8701 message age timer 0.00 | ||
| designated port 8003 forward delay timer 0.00 | ||
| designated cost 4 hold timer 0.70 | ||
| flags | ||
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| eth1 (1) | ||
| port id 8001 state blocking | ||
| designated root 8000.00163e060001 path cost 4 | ||
| designated bridge 8000.00163e060001 message age timer 19.88 | ||
| designated port 8002 forward delay timer 0.00 | ||
| designated cost 0 hold timer 0.00 | ||
| flags | ||
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| eth2 (2) | ||
| port id 8002 state forwarding | ||
| designated root 8000.00163e060001 path cost 4 | ||
| designated bridge 8000.00163e060001 message age timer 19.88 | ||
| designated port 8001 forward delay timer 0.00 | ||
| designated cost 0 hold timer 0.00 | ||
| flags | ||
| ``` | ||
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| Notice that `eth1` is in the blocking state. | ||
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| Login to the application and try to access something in the Internet (e.g. 8.8.8.8) | ||
| and the HTTP server: | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ eve attach-app-console 4d88a7c5-64fc-43ee-a58a-f5944bc7872c.1.1/cons | ||
| app$ ping -c 3 8.8.8.8 | ||
| PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. | ||
| 64 bytes from 8.8.8.8: icmp_seq=1 ttl=252 time=17.6 ms | ||
| 64 bytes from 8.8.8.8: icmp_seq=2 ttl=252 time=19.2 ms | ||
| 64 bytes from 8.8.8.8: icmp_seq=3 ttl=252 time=18.2 ms | ||
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| --- 8.8.8.8 ping statistics --- | ||
| 3 packets transmitted, 3 received, 0% packet loss, time 2004ms | ||
| rtt min/avg/max/mdev = 17.563/18.318/19.150/0.650 ms | ||
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| app$ curl httpserver.sdn/helloworld | ||
| Hello world from HTTP server | ||
| ``` | ||
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| Next, simulate forwarding port (`eth2` in this case) losing the connectivity | ||
| by changing the network model: | ||
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| ```shell | ||
| ./eden sdn net-model get > net-model | ||
| jq '(.ports[] | select(.logicalLabel == "eveport2").adminUP) = false' net-model > net-model-eth2-down | ||
| ./eden sdn net-model apply net-model-eth2-down | ||
| ``` | ||
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| Then check the STP link states of the non-root bridge (in this case inside SDN). | ||
| The previously Blocked port will transition through Listening, Learning and eventually | ||
| will reach the Forwarding state: | ||
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| ```shell | ||
| ./eden sdn ssh | ||
| sdn$ brctl showstp br-bridge1 | ||
| ... | ||
| flags TOPOLOGY_CHANGE | ||
| ... | ||
| eth1 (1) | ||
| port id 8001 state forwarding | ||
| designated root 8000.00163e060001 path cost 4 | ||
| designated bridge 8000.00163e060001 message age timer 19.42 | ||
| designated port 8002 forward delay timer 0.00 | ||
| designated cost 0 hold timer 0.00 | ||
| flags | ||
| ``` | ||
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| You may retry the connectivity tests from the application to confirm a successful failover. | ||
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| ## Example 2: Switch NI with VLAN access ports | ||
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| In this example, we create switch NI instance for VLANs 100 and 200. One application | ||
| is deployed inside each VLAN. Eden-SDN provides DHCP and IP gateway services for both VLANs | ||
| via trunk port. | ||
| Additionally, we add one physical access port for each VLAN and used them to connect | ||
| external HTTP servers directly into the segments. | ||
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| Here is a diagram depicting the network topology: | ||
|
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| ```text | ||
| +-----------------+ | ||
| | eth0 (EVE mgmt) |--------------------- | ||
| | (DHCP) | | | ||
| +-----------------+ | | ||
| +-----------+ | | ||
| | | | | ||
| | | +-------------------+ +------------------------+ | ||
| | |---<trunk>----| eth1 (app-shared) |------| router | | ||
| | | | (No IP, L2-only) | | (DHCP server per VLAN) | | ||
| | Switch NI | +-------------------+ +------------------------+ | ||
| | | | ||
| +------+ | | +-------------------+ +-------------+ | ||
| | app1 |--<VLAN 100>--| |--<VLAN 100>--| eth2 (app-shared) |------| httpserver1 | | ||
| +------+ | | | (No IP, L2-only) | +-------------+ | ||
| | | +-------------------+ | ||
| +------+ | | | ||
| | app2 |--<VLAN 200>--| | +-------------------+ +-------------+ | ||
| +------+ | |--<VLAN 200>--| eth3 (app-shared) |------| httpserver2 | | ||
| | | | (No IP, L2-only) | +-------------+ | ||
| +-----------+ +-------------------+ | ||
| ``` | ||
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| ```shell | ||
| make clean && make build-tests | ||
| ./eden config add default | ||
| ./eden config set default --key sdn.disable --value false | ||
| ./eden setup --eve-bootstrap-file $(pwd)/sdn/examples/switch-ni-multiple-ports/access-ports/device-config.json | ||
| ./eden start --sdn-network-model $(pwd)/sdn/examples/switch-ni-multiple-ports/access-ports/network-model.json | ||
| ./eden eve onboard | ||
| ./eden controller edge-node set-config --file $(pwd)/sdn/examples/switch-ni-multiple-ports/access-ports/device-config.json | ||
| ``` | ||
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| Once deployed, check that the bridge is created and has access VLANs set correctly for eth2, eth3 | ||
| and applications VIFs: | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ eve enter pillar | ||
| pillar$ bridge vlan show | ||
| port vlan-id | ||
| keth0 1 PVID Egress Untagged | ||
| eth1 1 PVID Egress Untagged | ||
| 100 | ||
| 200 | ||
| eth2 1 Egress Untagged | ||
| 100 PVID Egress Untagged | ||
| eth3 1 Egress Untagged | ||
| 200 PVID Egress Untagged | ||
| eth0 1 PVID Egress Untagged | ||
| bn1 1 PVID Egress Untagged | ||
| nbu1x1 1 Egress Untagged | ||
| 100 PVID Egress Untagged | ||
| nbu1x2 1 Egress Untagged | ||
| 200 PVID Egress Untagged | ||
| ``` | ||
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| Next, check that the bridge is VLAN-aware: | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ cat /sys/class/net/bn1/bridge/vlan_filtering | ||
| 1 | ||
| ``` | ||
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| Next, check that all port connecting endpoints (apps and HTTP servers) have BPDU guard enabled: | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ cat /sys/class/net/bn1/brif/eth1/bpdu_guard | ||
| 0 | ||
| eve$ cat /sys/class/net/bn1/brif/eth2/bpdu_guard | ||
| 1 | ||
| eve$ cat /sys/class/net/bn1/brif/eth3/bpdu_guard | ||
| 1 | ||
| eve$ cat /sys/class/net/bn1/brif/nbu1x1/bpdu_guard | ||
| 1 | ||
| eve$ cat /sys/class/net/bn1/brif/nbu1x2/bpdu_guard | ||
| 1 | ||
| ``` | ||
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| Login to the application `app1`, check that the IP address is from the range `10.203.10.0/24` | ||
| and try to access HTTP server in the same VLAN and something in the Internet (e.g. 8.8.8.8): | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ eve attach-app-console cee082fd-3a43-4599-bbd3-8216ffa8652d.1.1/cons | ||
| app1$ ifconfig eth0 | ||
| eth0 Link encap:Ethernet HWaddr 02:16:3E:2B:F1:BE | ||
| inet addr:10.203.10.129 Bcast:10.203.10.255 Mask:255.255.255.0 | ||
| UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 | ||
| RX packets:8 errors:0 dropped:0 overruns:0 frame:0 | ||
| TX packets:31 errors:0 dropped:0 overruns:0 carrier:0 | ||
| collisions:0 txqueuelen:1000 | ||
| RX bytes:1328 (1.2 KiB) TX bytes:5759 (5.6 KiB) | ||
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| app1$ curl httpserver100.sdn/helloworld | ||
| Hello world from HTTP server for VLAN 100 | ||
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| # Cannot access HTTP server in another VLAN: | ||
| app1$ curl --max-time 5 httpserver200.sdn/helloworld | ||
| curl: (28) Connection timed out after 5002 milliseconds | ||
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| app1$ ping -c 3 8.8.8.8 | ||
| PING 8.8.8.8 (8.8.8.8): 56 data bytes | ||
| 64 bytes from 8.8.8.8: seq=0 ttl=253 time=15.846 ms | ||
| 64 bytes from 8.8.8.8: seq=1 ttl=253 time=17.075 ms | ||
| 64 bytes from 8.8.8.8: seq=2 ttl=253 time=15.062 ms | ||
| --- 8.8.8.8 ping statistics --- | ||
| 3 packets transmitted, 3 packets received, 0% packet loss | ||
| round-trip min/avg/max = 15.062/15.994/17.075 ms | ||
| ``` | ||
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| Login to the application `app2`, check that the IP address is from the range `10.203.20.0/24` | ||
| and try to access HTTP server in the same VLAN and something in the Internet (e.g. 8.8.8.8): | ||
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| ```shell | ||
| ./eden eve ssh | ||
| eve$ eve attach-app-console 5341bfb9-c828-4f98-807e-e9763d4dc316.1.2/cons | ||
| app2$ ifconfig eth0 | ||
| eth0 Link encap:Ethernet HWaddr 02:16:3E:8A:6C:7D | ||
| inet addr:10.203.20.133 Bcast:10.203.20.255 Mask:255.255.255.0 | ||
| UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 | ||
| RX packets:8 errors:0 dropped:0 overruns:0 frame:0 | ||
| TX packets:31 errors:0 dropped:0 overruns:0 carrier:0 | ||
| collisions:0 txqueuelen:1000 | ||
| RX bytes:1328 (1.2 KiB) TX bytes:5759 (5.6 KiB) | ||
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| app2$ curl httpserver200.sdn/helloworld | ||
| Hello world from HTTP server for VLAN 200 | ||
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| # Cannot access HTTP server in another VLAN: | ||
| app2$ curl --max-time 5 httpserver100.sdn/helloworld | ||
| curl: (28) Connection timed out after 5002 milliseconds | ||
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| app2$ ping -c 3 8.8.8.8 | ||
| PING 8.8.8.8 (8.8.8.8): 56 data bytes | ||
| 64 bytes from 8.8.8.8: seq=0 ttl=253 time=16.407 ms | ||
| 64 bytes from 8.8.8.8: seq=1 ttl=253 time=18.493 ms | ||
| 64 bytes from 8.8.8.8: seq=2 ttl=253 time=14.792 ms | ||
| --- 8.8.8.8 ping statistics --- | ||
| 3 packets transmitted, 3 packets received, 0% packet loss | ||
| round-trip min/avg/max = 14.792/16.564/18.493 ms | ||
| ``` |
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