Change in ...osmo-ttcn3-hacks[master]: fix TC_ho_int; make neighbor config more robust

[neels]

neels has submitted this change and it was merged. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/15216 )

Change subject: fix TC_ho_int; make neighbor config more robust
......................................................................

fix TC_ho_int; make neighbor config more robust

Since osmo-bsc commit "neighbor config: allow re-using ARFCN+BSIC pairs"
(I29bca59ab232eddc74e0d4698efb9c9992443983), osmo-bsc considers only those
cells as neighbors that are explicitly listed, or all local cells if none are
listed. This lead to breaking TC_ho_int, because the osmo-bsc.cfg has only one
remote-cell neighbor for bts 0, and hence a handover to local cell bts 1 is now
regarded as invalid.

The remote-cell neighbor is needed for inter-BSC handover tests; also consider
that the TC_ho_neighbor_config_* tests each place individual neighbor
configuration by live VTY interaction.

Hence make all of these tests more robust: remove the neighbor config from the
osmo-bsc.cfg file, and instead include VTY interaction for each test case that
sets the particularly needed neighbor configuration at runtime.

An analogous osmo-bsc.cfg change in docker-playground is in change
If44dd6b578cdc55076c8180707d1c2d69fe5f2a8.

(It is not actually harmful to leave the neighbor config in osmo-bsc.cfg, but
remove that since it is also not needed anymore.)

Change-Id: If44dd6b578cdc55076c8180707d1c2d69fe5f2a8
---
M bsc/BSC_Tests.ttcn
M bsc/osmo-bsc.cfg
2 files changed, 5 insertions(+), 2 deletions(-)

Approvals:
  Jenkins Builder: Verified
  neels: Looks good to me, approved



diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 4497a2e..09c5e5c 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -2863,6 +2863,7 @@
 	ass_cmd.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
 
 	f_establish_fully(ass_cmd, exp_compl);
+	f_bts_0_cfg({"neighbor bts 1"});
 
 	var HandoverState hs := {
 		rr_ho_cmpl_seen := false,
@@ -2944,6 +2945,7 @@
 	var template PDU_BSSAP exp_compl := f_gen_exp_compl();
 	f_establish_fully(ass_req, exp_compl);
 
+	f_bts_0_cfg({"neighbor lac 99 arfcn 123 bsic any"});
 	f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
 
 	BSSAP.receive(tr_BSSMAP_HandoverRequired);
@@ -3010,6 +3012,7 @@
 	var template PDU_BSSAP exp_compl := f_gen_exp_compl();
 	f_establish_fully(ass_req, exp_compl);
 
+	f_bts_0_cfg({"neighbor lac 99 arfcn 123 bsic any"});
 	f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
 
 	BSSAP.receive(tr_BSSMAP_HandoverRequired);
@@ -3056,6 +3059,7 @@
 	var template PDU_BSSAP exp_compl := f_gen_exp_compl();
 	f_establish_fully(ass_req, exp_compl);
 
+	f_bts_0_cfg({"neighbor lac 99 arfcn 123 bsic any"});
 	f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
 
 	BSSAP.receive(tr_BSSMAP_HandoverRequired);
@@ -3140,6 +3144,7 @@
 	var template PDU_BSSAP exp_compl := f_gen_exp_compl();
 	f_establish_fully(ass_req, exp_compl);
 
+	f_bts_0_cfg({"neighbor lac 99 arfcn 123 bsic any"});
 	f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
 
 	BSSAP.receive(tr_BSSMAP_HandoverRequired);
diff --git a/bsc/osmo-bsc.cfg b/bsc/osmo-bsc.cfg
index 9384491..74fe255 100644
--- a/bsc/osmo-bsc.cfg
+++ b/bsc/osmo-bsc.cfg
@@ -88,8 +88,6 @@
   early-classmark-sending forbidden
   ip.access unit_id 1234 0
   oml ip.access stream_id 255 line 0
-  # remote-BSS neighbor:
-  neighbor lac 99 arfcn 123 bsic any
   neighbor-list mode manual-si5
   neighbor-list add arfcn 100
   neighbor-list add arfcn 200

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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: If44dd6b578cdc55076c8180707d1c2d69fe5f2a8
Gerrit-Change-Number: 15216
Gerrit-PatchSet: 2
Gerrit-Owner: neels <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: merged
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