[RT-7.3/RT-7.4] Update as-path-set deviation for Arista

Arista now supports `match-as-path-set` so we can remove
`match_as_path_set_unsupported` from the deviation. However, EOS requires
`ip as-path regex-mode string` to match as-path-set members as POSIX regexes.
Adding `routing_policy_as_path_set_enable_regex_mode` deviation which would
configure that in the test.

Author: yini101

feature/bgp/policybase/otg_tests/aspath_and_community_test/aspath_and_community_test.go

@@ -81,6 +81,13 @@ func configureImportBGPPolicy(t *testing.T, dut *ondatra.DUTDevice, ipv4 string,
 		stmt1.GetOrCreateConditions().GetOrCreateBgpConditions().GetOrCreateMatchAsPathSet().SetMatchSetOptions(aspMatchSetOptions)
 	}
 
+	if deviations.RoutingPolicyAsPathSetEnableRegexMode(dut) {
+		switch dut.Vendor() {
+		case ondatra.ARISTA:
+			cfgplugins.DeviationAristaRoutingPolicyBGPAsPathMatchMode(t, dut)
+		}
+	}
+
 	pdAllow := rp.GetOrCreatePolicyDefinition(RPLPermitAll)
 	st, err := pdAllow.AppendNewStatement("id-1")
 	if err != nil {
@@ -104,9 +111,6 @@ func configureImportBGPPolicy(t *testing.T, dut *ondatra.DUTDevice, ipv4 string,
 			cs = append(cs, oc.UnionString(communityMatch))
 		}
 		communitySet.SetCommunityMember(cs)
-		if deviations.BGPConditionsMatchCommunitySetUnsupported(dut) {
-			communitySet.SetMatchSetOptions(commMatchSetOptions)
-		}
 	}
 
 	var communitySetCLIConfig string

feature/bgp/policybase/otg_tests/aspath_and_community_test/metadata.textproto

@@ -18,7 +18,7 @@ platform_exceptions: {
     interface_enabled: true
     default_network_instance: "default"
     skip_setting_disable_metric_propagation: true
-    match_as_path_set_unsupported: true
+    routing_policy_as_path_set_enable_regex_mode: true
   }
 }
 

feature/bgp/policybase/otg_tests/aspath_test/aspath_test.go

@@ -74,6 +74,13 @@ func configureImportBGPPolicy(t *testing.T, dut *ondatra.DUTDevice, ipv4 string,
 	aspathSet := rp.GetOrCreateDefinedSets().GetOrCreateBgpDefinedSets().GetOrCreateAsPathSet(aspathSetName)
 	aspathSet.SetAsPathSetMember(aspathMatch)
 
+	if deviations.RoutingPolicyAsPathSetEnableRegexMode(dut) {
+		switch dut.Vendor() {
+		case ondatra.ARISTA:
+			cfgplugins.DeviationAristaRoutingPolicyBGPAsPathMatchMode(t, dut)
+		}
+	}
+
 	if !deviations.MatchAsPathSetUnsupported(dut) {
 		stmt1.GetOrCreateConditions().GetOrCreateBgpConditions().GetOrCreateMatchAsPathSet().SetAsPathSet(aspathSetName)
 		stmt1.GetOrCreateConditions().GetOrCreateBgpConditions().GetOrCreateMatchAsPathSet().SetMatchSetOptions(matchSetOptions)

feature/bgp/policybase/otg_tests/aspath_test/metadata.textproto

@@ -16,7 +16,7 @@ platform_exceptions: {
     interface_enabled: true
     default_network_instance: "default"
     skip_setting_disable_metric_propagation: true
-    match_as_path_set_unsupported: true
+    routing_policy_as_path_set_enable_regex_mode: true
   }
 }
 platform_exceptions: {

internal/cfgplugins/bgp_policy.go

@@ -99,6 +99,13 @@ match as-path %s
 	helpers.GnmiCLIConfig(t, dut, config)
 }
 
+// DeviationsAristaRoutingPolicyBGPAsPathMatchMode is used to enable POSIX regex matching for
+// AS Path Sets
+func DeviationAristaRoutingPolicyBGPAsPathMatchMode(t *testing.T, dut *ondatra.DUTDevice) {
+	config := "ip as-path regex-mode string"
+	helpers.GnmiCLIConfig(t, dut, config)
+}
+
 // DeviationCiscoRoutingPolicyBGPToISIS is used as an alternative for DUTs that don't support
 // direct redistribution from BGP to ISIS using community match as condition.
 // This deviation implements CLI to perform the equivalent function.

internal/deviations/deviations.go

@@ -2011,3 +2011,10 @@ func ArpFT(dut *ondatra.DUTDevice) string {
 func PrefixLimitConfigUnsupported(dut *ondatra.DUTDevice) bool {
 	return lookupDUTDeviations(dut).GetPrefixLimitConfigUnsupported()
 }
+
+// RoutingPolicyAsPathSetEnableRegexMode returns true if the device needs to separately enable regex
+// matching for as-path set members.
+// Arista: https://issuetracker.google.com/496260572
+func RoutingPolicyAsPathSetEnableRegexMode(dut *ondatra.DUTDevice) bool {
+	return lookupDUTDeviations(dut).GetRoutingPolicyAsPathSetEnableRegexMode()
+}

proto/metadata.proto

@@ -1207,6 +1207,10 @@ message Metadata {
     // Device does not support configuring prefix limit received paths through OC
     // Cisco: https://partnerissuetracker.corp.google.com/issues/447509237
     bool prefix_limit_config_unsupported = 393;
+
+    // Device requires additional configuration to enable as-path regex matching
+    // Arista: b/496260572
+    bool routing_policy_as_path_set_enable_regex_mode = 394;
 
     // Reserved field numbers and identifiers.
     reserved 84, 9, 28, 20, 38, 43, 90, 97, 55, 89, 19, 36, 35, 40, 113, 131, 141, 173, 234, 254, 231, 300, 241;