Updated the YANG model for ERSPAN mirror sessions

[mramezani95]

Why I did it

PR 3317 in sonic-swss enables configuration of IPv6 mirror sessions (in which both src_ip and dst_ip are IPv6 addresses). This PR updates the YANG model for ERSPAN mirror sessions so that IPv6 mirror sessions can be configured using the config apply-patch command.

Work item tracking

• Microsoft ADO (number only): 33501400

How I did it

1. Changed the type of src_ip and dst_ip for ERSPAN mirror sessions to ip-address so that IPv6 addresses are also accepted.
2. Added a condition to ensure that both src_ip and dst_ip have the same IP version.
3. Added a test to verify that a mirror session with IPv6 src_ip and dst_ip can be successfully configured.

How to verify it

Use config apply-patch to configure an ERSPAN mirror session with IPv6 src_ip and dst_ip addresses. For example:

$ cat ./mirror_session.patch
[
        {
                "op": "add",
                "path": "/MIRROR_SESSION",
                "value": {
                        "test_session": {
                                "type": "ERSPAN",
                                "src_ip": "1001::1",
                                "dst_ip": "2002::2",
                                "gre_type": "0x8949",
                                "dscp": "8",
                                "ttl": "64",
                                "queue": "0",
                                "direction": "RX"
                        }
                }
        }
]
$ sudo config apply-patch ./mirror_session.patch
Patch Applier: localhost: Patch application starting.
Patch Applier: localhost: Patch: [{"op": "add", "path": "/MIRROR_SESSION", "value": {"test_session": {"type": "ERSPAN", "src_ip": "1001::1", "dst_ip": "2002::2", "gre_type": "0x8949", "dscp": "8", "ttl": "64", "queue": "0", "direction": "RX"}}}]
Patch Applier: localhost getting current config db.
Patch Applier: localhost: simulating the target full config after applying the patch.
Patch Applier: localhost: validating all JsonPatch operations are permitted on the specified fields
Patch Applier: localhost: validating target config does not have empty tables,
                            since they do not show up in ConfigDb.
Patch Applier: localhost: sorting patch updates.
Patch Applier: The localhost patch was converted into 1 change:
Patch Applier: localhost: applying 1 change in order:
Patch Applier:   * [{"op": "add", "path": "/MIRROR_SESSION", "value": {"test_session": {"type": "ERSPAN", "src_ip": "1001::1", "dst_ip": "2002::2", "gre_type": "0x8949", "dscp": "8", "ttl": "64", "queue": "0", "direction": "RX"}}}]
Patch Applier: localhost: verifying patch updates are reflected on ConfigDB.
Patch Applier: localhost patch application completed.
Patch applied successfully.
$ show mirror_session
ERSPAN Sessions
Name          Status    SRC IP    DST IP    GRE       DSCP    TTL    Queue  Policer    Monitor Port    SRC Port    Direction
------------  --------  --------  --------  ------  ------  -----  -------  ---------  --------------  ----------  -----------
test_session  active    1001::1   2002::2   0x8949       8     64        0             Ethernet104                 rx

If src_ip and dst_ip have different IP versions, the apply-patch command should fail:

$ cat ./mirror_session.patch
[
        {
                "op": "add",
                "path": "/MIRROR_SESSION",
                "value": {
                        "invalid_session": {
                                "type": "ERSPAN",
                                "src_ip": "1.1.1.1",
                                "dst_ip": "2002::2",
                                "gre_type": "0x8949",
                                "dscp": "8",
                                "ttl": "64",
                                "queue": "0",
                                "direction": "RX"
                        }
                }
        }
]
$ sudo config apply-patch ./mirror_session.patch
libyang[0]: Must condition "(contains(current(), ':') and contains(../dst_ip, ':')) or (contains(current(), '.') and contains(../dst_ip, '.'))" not satisfied. (path: /sonic-mirror-session:sonic-mirror-session/MIRROR_SESSION/MIRROR_SESSION_LIST[name='invalid_session']/src_ip)
libyang[0]: src_ip and dst_ip must have the same IP version. (path: /sonic-mirror-session:sonic-mirror-session/MIRROR_SESSION/MIRROR_SESSION_LIST[name='invalid_session']/src_ip)
sonic_yang(3):Data Loading Failed:src_ip and dst_ip must have the same IP version.
Failed to apply patch due to: Validate json patch: [{"op": "add", "path": "/MIRROR_SESSION", "value": {"invalid_session": {"type": "ERSPAN", "src_ip": "1.1.1.1", "dst_ip": "2002::2", "gre_type": "0x8949", "dscp": "8", "ttl": "64", "queue": "0", "direction": "RX"}}}] failed due to:Data Loading Failed
src_ip and dst_ip must have the same IP version.
Usage: config apply-patch [OPTIONS] PATCH_FILE_PATH
Try "config apply-patch -h" for help.

Error: Validate json patch: [{"op": "add", "path": "/MIRROR_SESSION", "value": {"invalid_session": {"type": "ERSPAN", "src_ip": "1.1.1.1", "dst_ip": "2002::2", "gre_type": "0x8949", "dscp": "8", "ttl": "64", "queue": "0", "direction": "RX"}}}] failed due to:Data Loading Failed
src_ip and dst_ip must have the same IP version.

Which release branch to backport (provide reason below if selected)

• 202205
• 202211
• 202305
• 202311
• 202405
• 202411
• 202505

Tested branch (Please provide the tested image version)

• 20250625.014807

Description for the changelog

Updated the YANG model for ERSPAN mirror sessions to support IPv6 source and destination addresses.

Link to config_db schema for YANG module changes

https://github.com/sonic-net/sonic-buildimage/blob/master/src/sonic-yang-models/doc/Configuration.md#acl-and-mirroring

[mssonicbld]

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[mramezani95]

/azpw ms_conflict

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[wen587]

lgtm

[mssonicbld]

Cherry-pick PR to 202505: #23310

[mssonicbld]

Cherry-pick PR to msft-202412: Azure/sonic-buildimage-msft#1682