How to run multiple controllers about p4-utils HOT 6 CLOSED

That is possible. You can connect two controllers as long as the controller can send packets to the port the switch program is listening to.

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That is possible. You can connect two controllers as long as the controller can send packets to the port the switch program is listening to.

When I tried to connect using p4utils's SimpleSwitchP4RuntimeAPI it shows:

CRITICAL:root:StreamChannel error, closing stream
CRITICAL:root:P4Runtime RPC error (INVALID_ARGUMENT): Election id already exists
CRITICAL:root:Failed to establish session with server

I tried changing the election_id to different tuple it works then. but i am sure it is wrong.

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Can you try with the thrift client? I guess you are using the P4runtime one. I am trying to recall this, but I believe I only attempted to connect to the same switch from multiple controllers using the thrift API. I, however, understand you do not want to use that deprecated API.

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Can you try with the thrift client? I guess you are using the P4runtime one. I am trying to recall this, but I believe I only attempted to connect to the same switch from multiple controllers using the thrift API. I, however, understand you do not want to use that deprecated API.

Thank you @edgar-costa works when I use thrift API.

Also I have one more question, How to send some of the packets to embedded controller and some to remote controller. Currently all the packets are going to both controller.

in my p4 code I am using this

clone3(CloneType.I2E, 100, meta);

and in the controller this

self.controller.mirroring_add(100, self.cpu_port)

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Well, packets are received by using veth interfaces. If both controllers are listening to the same interface, they will receive the packet two times. You need to either, add 2 CPU ports (not directly supported by p4-utils) or you should add some sort of TAG to your packets so you can filter them at the controller.

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Thanks @edgar-costa

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