diff --git a/data/templates/frr/zebra.segment_routing.frr.j2 b/data/templates/frr/zebra.segment_routing.frr.j2
index 7b12fcdd0a..718d47d8f5 100644
--- a/data/templates/frr/zebra.segment_routing.frr.j2
+++ b/data/templates/frr/zebra.segment_routing.frr.j2
@@ -10,6 +10,9 @@ segment-routing
 {%         endif %}
 {%         if locator_config.behavior_usid is vyos_defined %}
     behavior usid
+{%         endif %}
+{%         if locator_config.format is vyos_defined %}
+    format {{ locator_config.format }}
 {%         endif %}
     exit
     !
diff --git a/interface-definitions/protocols_segment-routing.xml.in b/interface-definitions/protocols_segment-routing.xml.in
index c299f624e4..688b253b68 100644
--- a/interface-definitions/protocols_segment-routing.xml.in
+++ b/interface-definitions/protocols_segment-routing.xml.in
@@ -126,6 +126,25 @@
                     </properties>
                     <defaultValue>24</defaultValue>
                   </leafNode>
+                  <leafNode name="format">
+                    <properties>
+                      <help>SRv6 SID format</help>
+                      <completionHelp>
+                        <list>uncompressed-f4024 usid-f3216</list>
+                      </completionHelp>
+                      <valueHelp>
+                        <format>uncompressed-f4024</format>
+                        <description>Uncompressed f4024 format</description>
+                      </valueHelp>
+                      <valueHelp>
+                        <format>usid-f3216</format>
+                        <description>usid-f3216 format</description>
+                      </valueHelp>
+                      <constraint>
+                        <regex>(uncompressed-f4024|usid-f3216)</regex>
+                      </constraint>
+                    </properties>
+                  </leafNode>
                 </children>
               </tagNode>
             </children>
diff --git a/smoketest/scripts/cli/test_protocols_segment-routing.py b/smoketest/scripts/cli/test_protocols_segment-routing.py
index b1cac74835..af4ef2adf2 100755
--- a/smoketest/scripts/cli/test_protocols_segment-routing.py
+++ b/smoketest/scripts/cli/test_protocols_segment-routing.py
@@ -26,6 +26,7 @@
 
 base_path = ['protocols', 'segment-routing']
 
+
 class TestProtocolsSegmentRouting(VyOSUnitTestSHIM.TestCase):
     @classmethod
     def setUpClass(cls):
@@ -47,14 +48,64 @@ def tearDown(self):
     def test_srv6(self):
         interfaces = Section.interfaces('ethernet', vlan=False)
         locators = {
-            'foo' : { 'prefix' : '2001:a::/64' },
-            'foo' : { 'prefix' : '2001:b::/64', 'usid' : {} },
+            'foo1': {'prefix': '2001:a::/64'},
+            'foo2': {'prefix': '2001:b::/64', 'usid': {}},
+            'foo3': {'prefix': '2001:c::/64', 'format': 'uncompressed-f4024'},
+            'foo4': {
+                'prefix': '2001:d::/48',
+                'block-len': '32',
+                'node-len': '16',
+                'func-bits': '16',
+                'usid': {},
+                'format': 'usid-f3216',
+            },
         }
 
         for locator, locator_config in locators.items():
-            self.cli_set(base_path + ['srv6', 'locator', locator, 'prefix', locator_config['prefix']])
+            self.cli_set(
+                base_path
+                + ['srv6', 'locator', locator, 'prefix', locator_config['prefix']]
+            )
+            if 'block-len' in locator_config:
+                self.cli_set(
+                    base_path
+                    + [
+                        'srv6',
+                        'locator',
+                        locator,
+                        'block-len',
+                        locator_config['block-len'],
+                    ]
+                )
+            if 'node-len' in locator_config:
+                self.cli_set(
+                    base_path
+                    + [
+                        'srv6',
+                        'locator',
+                        locator,
+                        'node-len',
+                        locator_config['node-len'],
+                    ]
+                )
+            if 'func-bits' in locator_config:
+                self.cli_set(
+                    base_path
+                    + [
+                        'srv6',
+                        'locator',
+                        locator,
+                        'func-bits',
+                        locator_config['func-bits'],
+                    ]
+                )
             if 'usid' in locator_config:
                 self.cli_set(base_path + ['srv6', 'locator', locator, 'behavior-usid'])
+            if 'format' in locator_config:
+                self.cli_set(
+                    base_path
+                    + ['srv6', 'locator', locator, 'format', locator_config['format']]
+                )
 
         # verify() - SRv6 should be enabled on at least one interface!
         with self.assertRaises(ConfigSessionError):
@@ -65,16 +116,33 @@ def test_srv6(self):
         self.cli_commit()
 
         for interface in interfaces:
-            self.assertEqual(sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1')
-            self.assertEqual(sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '0') # default
-
-        frrconfig = self.getFRRconfig(f'segment-routing', endsection='^exit')
-        self.assertIn(f'segment-routing', frrconfig)
-        self.assertIn(f' srv6', frrconfig)
-        self.assertIn(f'  locators', frrconfig)
+            self.assertEqual(
+                sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1'
+            )
+            self.assertEqual(
+                sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '0'
+            )  # default
+
+        frrconfig = self.getFRRconfig('segment-routing', endsection='^exit')
+        self.assertIn('segment-routing', frrconfig)
+        self.assertIn(' srv6', frrconfig)
+        self.assertIn('  locators', frrconfig)
         for locator, locator_config in locators.items():
+            prefix = locator_config['prefix']
+            block_len = locator_config.get('block-len', '40')
+            node_len = locator_config.get('node-len', '24')
+            func_bits = locator_config.get('func-bits', '16')
+
             self.assertIn(f'   locator {locator}', frrconfig)
-            self.assertIn(f'    prefix {locator_config["prefix"]} block-len 40 node-len 24 func-bits 16', frrconfig)
+            self.assertIn(
+                f'    prefix {prefix} block-len {block_len} node-len {node_len} func-bits {func_bits}',
+                frrconfig,
+            )
+
+            if 'format' in locator_config:
+                self.assertIn(f'    format {locator_config["format"]}', frrconfig)
+            if 'usid' in locator_config:
+                self.assertIn('    behavior usid', frrconfig)
 
     def test_srv6_sysctl(self):
         interfaces = Section.interfaces('ethernet', vlan=False)
@@ -86,8 +154,12 @@ def test_srv6_sysctl(self):
         self.cli_commit()
 
         for interface in interfaces:
-            self.assertEqual(sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1')
-            self.assertEqual(sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '-1') # ignore
+            self.assertEqual(
+                sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1'
+            )
+            self.assertEqual(
+                sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '-1'
+            )  # ignore
 
         # HMAC drop
         for interface in interfaces:
@@ -96,8 +168,12 @@ def test_srv6_sysctl(self):
         self.cli_commit()
 
         for interface in interfaces:
-            self.assertEqual(sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1')
-            self.assertEqual(sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '1') # drop
+            self.assertEqual(
+                sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1'
+            )
+            self.assertEqual(
+                sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '1'
+            )  # drop
 
         # Disable SRv6 on first interface
         first_if = interfaces[-1]
@@ -106,5 +182,6 @@ def test_srv6_sysctl(self):
 
         self.assertEqual(sysctl_read(f'net.ipv6.conf.{first_if}.seg6_enabled'), '0')
 
+
 if __name__ == '__main__':
     unittest.main(verbosity=2)