Change in osmo-gsm-tester[master]: srsenb.conf.tmpl: use gtp_bind_addr also s1c bind

[srs_andre]

srs_andre has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-gsm-tester/+/18583 )

Change subject: srsenb.conf.tmpl: use gtp_bind_addr also s1c bind
......................................................................


Patch Set 4:

> Patch Set 4:
> 
> So If I understand correctly, let's say you have:
> * machineA=10.42.42.10
> * machineB=10.42.42.20
> with srsUE running on machineA and srsENB and srsEPC on machineB.
> 
> What would be wrong with using this setup?
> 
> """
> run_node: #epc
> - run_type: ssh
>   run_addr: 10.42.42.20
>   ssh_user: jenkins
>   ssh_addr: 10.42.42.20
> 
> enb:
> - label: srsENB-zmq
>   type: srsenb
>   rf_dev_type: zmq
>   rf_dev_args: auto
>   gtp_bind_addr: 127.0.1.1
>   run_node:
>     run_type: ssh
>     run_addr: 10.42.42.20
>     ssh_user: jenkins
>     ssh_addr: 10.42.42.20
> 
> - label: srsUE-zmq_1
>   type: srsue
>   rf_dev_type: zmq
>   rf_dev_args: auto
>   imsi: '001010123456789'
>   ki: '00112233445566778899aabbccddeeff'
>   auth_algo: 'xor'
>   features: ['4g']
>   run_node:
>     run_type: ssh
>     run_addr: 10.42.42.10
>     ssh_user: jenkins
>     ssh_addr: 10.42.42.10
> """
> 
> UE<->ENB over zmq: 10.42.42.10 <-> 10.42.42.20  (not same port, anyway we use different IP)
> ENB<->EPC over S1: 10.42.42.20 <-> 10.42.42.20 (not same port, fine with reusing IP)
> ENB<->EPC over GTP: 127.0.1.1 <-> 10.42.42.20 (different IP, gtp port must be same in both)

It worked with srsENB/srsEPC. But Amarisoft eNB refuses to connect to to the EPC with this config.

```
  /* Enable remote API and Web interface */
  com_addr: "10.12.1.195:9001",

  mme_list: [
    {
      /* address of MME for S1AP connection. Must be modified if the MME
         runs on a different host. */
      mme_addr: "10.12.1.195",
    },
  ],
  /* GTP bind address (=address of the ethernet interface connected to
     the MME). Must be modified if the MME runs on a different host. */
  gtp_addr: "127.0.1.1",
```


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Gerrit-Project: osmo-gsm-tester
Gerrit-Branch: master
Gerrit-Change-Id: Ibf5b0017c781d17c7f20b859c1cda297e2a9cca2
Gerrit-Change-Number: 18583
Gerrit-PatchSet: 4
Gerrit-Owner: srs_andre <andre at softwareradiosystems.com>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: srs_andre <andre at softwareradiosystems.com>
Gerrit-Comment-Date: Thu, 11 Jun 2020 07:59:55 +0000
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