BGP to MPLS Labeled Unicast

[SuryyaKrJana]

OTG Model: BGP MPLS Labeled IPv4/IPv6 Unicast

1. Added provision for MPLS IPv4/IPv6 capabilities device.bgp.capablity.ipv4_mpls/bgp.capabliti.ipv6_mpls or for multiple labels device.bgp.capablity.ipv4_mpls_multi/bgp.capabliti.ipv6_mpls_multi
2. Added provision for adding one or more MPLS Label BGP V4/V6 route ranges.

Redocly References:
Redocly

       d1Bgp := d1.Bgp().
		SetRouterId("1.1.1.2")

	d1BgpIpv4Interface1 := d1Bgp.
		Ipv4Interfaces().Add().
		SetIpv4Name("p1d1ipv4")

	d1BgpIpv4Interface1Peer1 := d1BgpIpv4Interface1.
		Peers().
		Add().
		SetAsNumber(2222).
		SetAsType(gosnappi.BgpV4PeerAsType.EBGP).
		SetPeerAddress("1.1.1.1").
		SetName("p1d1bgpv4")

	/*  Configure Mpls Single Label Capability */
	d1BgpIpv4Interface1Peer1.Capability().SetIpv4Mpls(true).SetIpv6Mpls(true)

	/* If it is needed to send multiple Labels, say, 2 labels then
	   d1BgpIpv4Interface1Peer1.Capability().SetIpv4MplsMulti(2).SetIpv6MplsMulti(2)
	*/

	d1BgpIpv4Interface1Peer1V4Route1 := d1BgpIpv4Interface1Peer1.
		V4Routes().
		Add().
		SetName("p1d1peer1rrv4")

	d1BgpIpv4Interface1Peer1V4Route1.Addresses().Add().
		SetAddress("10.10.10.1").
		SetPrefix(32).
		SetCount(2)

	d1BgpIpv4Interface1Peer1V4Route1.Advanced().
		SetMultiExitDiscriminator(50).
		SetOrigin(gosnappi.BgpRouteAdvancedOrigin.EGP)

	Peer1MplsLabels :=
		d1BgpIpv4Interface1Peer1V4Route1.MplsLabels()

	Peer1MplsLabels.Labels().Add().SetStart(16000)

	/* For adding another Label in case of added multi-lable capability
	   Peer1MplsLabels.Labels().Add().SetStart(17000)
	*/

	// add protocol stacks for device d2
	d2Eth1 := d2.Ethernets().
		Add().
		SetName("p2d1eth").
		SetMac("00:00:02:02:02:02").
		SetMtu(1500)

	d2Eth1.Connection().SetPortName(p2.Name())

	d2Eth1.
		Ipv4Addresses().
		Add().
		SetName("p2d1ipv4").
		SetAddress("2.2.2.2").
		SetGateway("2.2.2.1").
		SetPrefix(32)

	d2Bgp := d2.Bgp().
		SetRouterId("2.2.2.2")

	d2BgpIpv4Interface1 := d2Bgp.
		Ipv4Interfaces().Add().
		SetIpv4Name("p2d1ipv4")

	d2BgpIpv4Interface1Peer1 := d2BgpIpv4Interface1.
		Peers().
		Add().
		SetAsNumber(3333).
		SetAsType(gosnappi.BgpV4PeerAsType.EBGP).
		SetPeerAddress("2.2.2.1").
		SetName("p2d1bgpv4")

	d1BgpIpv4Interface1Peer1.Capability().SetIpv4MplsMulti(2).SetIpv6MplsMulti(2)

	d2BgpIpv4Interface1Peer1V4Route1 := d2BgpIpv4Interface1Peer1.
		V4Routes().
		Add().
		SetName("p2d1peer1rrv4")

	d2BgpIpv4Interface1Peer1V4Route1.Addresses().Add().
		SetAddress("20.20.20.1").
		SetPrefix(32).
		SetCount(2)

	d2BgpIpv4Interface1Peer1V4Route1.Advanced().
		SetMultiExitDiscriminator(40).
		SetOrigin(gosnappi.BgpRouteAdvancedOrigin.EGP)

	Peer2V4Route1Label :=
		d2BgpIpv4Interface1Peer1V4Route1.MplsLabels()

	Peer2V4Route1Label.Labels().Add().SetStart(1000)
	Peer2V4Route1Label.Labels().Add().SetStart(2000)

	// add endpoints and packet description flow 1
	f1 := config.Flows().Items()[0]
	f1.SetName(p1.Name() + " -> " + p2.Name()).
		TxRx().Device().
		SetTxNames([]string{d1BgpIpv4Interface1Peer1V4Route1.Name()}).
		SetRxNames([]string{d2BgpIpv4Interface1Peer1V4Route1.Name()})

	f1Eth := f1.Packet().Add().Ethernet()
	f1Eth.Src().SetValue(d1Eth1.Mac())
	f1Eth.Dst().Auto()

	f1Mpls := f1.Packet().Add().Mpls()

	/* MPLS-IPv4 Labeled SIDs 16000  plus 1000 & 2000 were advertised from BGP Peer 2 */
	f1Mpls.Label().SetValue(uint32(17000))
	f1Mpls.Label().SetValue(uint32(18000))
	f1Mpls.TrafficClass().SetValues([]uint32{1, 2})

	f1Ip := f1.Packet().Add().Ipv4()
	f1Ip.Src().SetValue("10.10.10.1")
	f1Ip.Dst().SetValue("20.20.20.1")

	// add endpoints and packet description flow 2
	f2 := config.Flows().Items()[1]
	f2.SetName(p2.Name() + " -> " + p1.Name()).
		TxRx().Device().
		SetTxNames([]string{d2BgpIpv4Interface1Peer1V4Route1.Name()}).
		SetRxNames([]string{d1BgpIpv4Interface1Peer1V4Route1.Name()})

	f2Eth := f2.Packet().Add().Ethernet()
	f2Eth.Src().SetValue(d2Eth1.Mac())
	f2Eth.Dst().Auto()

	f2Mpls := f2.Packet().Add().Mpls()
	/* IPv4 Labeled SIDs 16000 was advertised from BGP Peer 1 */
	f2Mpls.Label().SetValue(uint32(16000))

	f2Ip := f2.Packet().Add().Ipv4()
	f2Ip.Src().SetValue("20.20.20.1")
	f2Ip.Dst().SetValue("10.10.10.1")

[apratimmukherjee]

Some minor comments + query on disabling multi_label capability