fix(get_config): try legacy KEX first in SSH fallback for HP 2530/Mocana SSH

napalm_procurve/procurve.py

@@ -590,16 +590,25 @@ class ProcurveDriver(ConfigLifecycleMixin, SwitchDriver):
         """Open a one-shot SSH session to retrieve running-config.
 
         Used as fallback when the REST API does not expose the config endpoint
-        (e.g. HP 2530 / YA firmware).  Returns empty string on any failure.
+        (e.g. HP 2530 / YA firmware with Mocana SSH).  Tries legacy KEX
+        algorithms first (required for older ProCurve firmware), then standard.
+        Returns empty string on any failure.
         """
+        for legacy in (True, False):
             try:
-            conn = ConnectHandler(**self._netmiko_kwargs())
+                conn = ConnectHandler(**self._netmiko_kwargs(legacy=legacy))
                 try:
                     return conn.send_command("show running-config")
                 finally:
                     conn.disconnect()
             except Exception as exc:
-            logger.warning("SSH config fallback failed for %s: %s", self.hostname, exc)
+                logger.debug(
+                    "SSH config fallback (%s) failed for %s: %s",
+                    "legacy" if legacy else "standard",
+                    self.hostname,
+                    exc,
+                )
+        logger.warning("SSH config fallback failed for %s (all transports)", self.hostname)
         return ""
 
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