```
  	config := gosnappi.NewConfig()

// add ports
p1 := config.Ports().Add().SetName("p1").SetLocation(opts.IxiaCPorts()[0])
p2 := config.Ports().Add().SetName("p2").SetLocation(opts.IxiaCPorts()[1])

// add devices
d1 := config.Devices().Add().SetName("d1")
d2 := config.Devices().Add().SetName("d2")

// add protocol stacks for device d1
d1Eth1 := d1.Ethernets().
	Add().
	SetName("d1Eth").
	SetMac("00:00:01:01:01:01").
	SetMtu(1500)

d1Eth1.Connection().SetPortName(p1.Name())

d1Eth1.
	Ipv4Addresses().
	Add().
	SetName("p1d1-ipv4").
	SetAddress("1.1.1.1").
	SetGateway("1.1.1.2").
	SetPrefix(24)

d1Isis := d1.Isis().
	SetName("p1d1isis").
	SetSystemId("640000000001")

d1Isis.Advanced().SetAreaAddresses([]string{
	"490001",
})

d1Isis.Basic().SetHostname("ixia-c-port1").SetIpv4TeRouterId("1.1.1.1")

// Enabling Segmented Routing and configuring Router capabilities.
    srStartingSid := 16000
srRange := 8000
    sid1Off := 100
    sid2Off  := 200
    sid3Off  := 300
    sid4Off  := 400

sr := d1Isis.SegmentRouting()
rtrCap := sr.RouterCapability()
rtrCap.Algorithms().Add().SetAlgorithm(0).SetAlgorithm(1)

rtrCap.SrlbRanges().Add().SetStartingSid(uint32(sr1StartingSid)).SetRange(uint32(sr1Range))
rtrCap.SetSBit(gosnappi.IsisRouterCapabilitySBit.FLOOD)
rtrCap.SetDBit(gosnappi.IsisRouterCapabilityDBit.NOT_DOWN)

srCap := rtrCap.SrCapability()
srCap.Flags().SetIpv4Mpls(true).SetIpv4Mpls(true)
srCap.SrgbRanges().Add().SetStartingSid(srStartingSid).SetRange(srRange)

d1IsisIntf := d1Isis.Interfaces().Add().SetEthName(d1Eth1.Name()).
	SetName("p1d1isis1-intf1").
	SetMetric(10).
	SetNetworkType(gosnappi.IsisInterfaceNetworkType.POINT_TO_POINT).
	SetLevelType(gosnappi.IsisInterfaceLevelType.LEVEL_1)
d1IsisIntf.L1Settings().SetDeadInterval(30).SetHelloInterval(10).SetPriority(0)

// Configuring Adjacency SID
d1IsisIntf.AdjacencySids().Add().SetSidIndex(sid3Off).SetPFlag(true)

d1IsisRoute1 := d1Isis.V4Routes().Add().SetName("p1d1isis-rr1")
d1IsisRoute1.Addresses().
	Add().
	SetAddress("21.1.1.1").
	SetPrefix(24).
	SetCount(1).
	SetStep(1)

//Configure Prefix Attribute
d1IsisRoute1.SetPrefixAttrEnabled(true).SetRFlag(true).SetNFlag(true)

//Configure Prefix Sid
d1IsisRoute1.PrefixSids().Add().SetSidIndex(uint32(sid1Off)).SetRFlag(true).SetNFlag(true).SetPFlag(true)

// add protocol stacks for device d2
d2Eth1 := d2.Ethernets().
	Add().
	SetName("d2Eth").
	SetMac("00:00:02:02:02:02").
	SetMtu(1500)

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

d2Eth1.
	Ipv4Addresses().
	Add().
	SetName("p2d1-ipv4").
	SetAddress("1.1.1.2").
	SetGateway("1.1.1.1").
	SetPrefix(24)

d2Isis := d2.Isis().
	SetName("p2d1isis").
	SetSystemId("650000000001")

d2Isis.Basic().SetHostname("ixia-c-port2").SetIpv4TeRouterId("1.1.1.2")

// Enabling Segmented Routing and configuring Router capabilities.
// Enabling Segmented Routing and configuring Router capabilities.
sr2 := d2Isis.SegmentRouting()
rtrCap2 := sr2.RouterCapability()
rtrCap2.Algorithms().Add().SetAlgorithm(0).SetAlgorithm(100)
rtrCap2.SrlbRanges().Add().SetStartingSid(srStartingSid ).SetRange(srRange )
rtrCap2.SetSBit(gosnappi.IsisRouterCapabilitySBit.FLOOD)
rtrCap2.SetDBit(gosnappi.IsisRouterCapabilityDBit.NOT_DOWN)

srCap2 := rtrCap.SrCapability()
srCap2.Flags().SetIpv4Mpls(true).SetIpv4Mpls(true)
srCap2.SrgbRanges().Add().SetStartingSid(uint32(srStartingSid)).SetRange(uint32(srRange))

d2IsisIntf := d2Isis.Interfaces().Add().SetEthName(d2Eth1.Name()).
	SetName("p2d1isis1-intf1").
	SetMetric(10).
	SetNetworkType(gosnappi.IsisInterfaceNetworkType.POINT_TO_POINT).
	SetLevelType(gosnappi.IsisInterfaceLevelType.LEVEL_1)
d2IsisIntf.L1Settings().SetDeadInterval(30).SetHelloInterval(10).SetPriority(0)
d2Isis.Advanced().SetAreaAddresses([]string{
	"490001",
})

d2IsisIntf.AdjacencySids().Add().SetSidIndex(sid4Off ).SetPFlag(true)

d2IsisRoute1 := d2Isis.V4Routes().Add().SetName("p2d1isis-rr1")
d2IsisRoute1.Addresses().
	Add().
	SetAddress("22.1.1.1").
	SetPrefix(24).
	SetCount(1).
	SetStep(1)

//Configure Prefix Attribute
d2IsisRoute1.SetPrefixAttrEnabled(true).SetRFlag(true).SetNFlag(true)

//Configure Prefix Sid
d2IsisRoute1.PrefixSids().Add().SetSidIndex(uint32(sid2Off)).SetRFlag(true).SetNFlag(true).SetPFlag(true)

// Add P1 <---> P2
flowCount := 2
for i := 1; i <= flowCount; i++ {
	fmt.Println("flow --> ", i)
	flow := config.Flows().Add()
	flow.Metrics().SetEnable(true)
	flow.Duration().FixedPackets().SetPackets(500)
	flow.Rate().SetPps(10)

}

// P1 ---> P2
f1 := config.Flows().Items()[0]
flowName := fmt.Sprint("p1 --> p2 flow", 1)
TxName := fmt.Sprint("MPLS Traffic Label Learned at P1", 1)
f1.SetName(flowName).
	TxRx().Device().
	SetTxNames([]string{TxName}).
	SetRxNames([]string{d2IsisRoute1.Name()})

f1Eth := f1.Packet().Add().Ethernet()
f1Eth.Src().SetValue(d1Eth1.Mac())
f1Eth.Dst().Auto()
    // Configuring static Node SID that will be advertised by ISIS Router on Port P2.  
    // However, we can configure with array of Node and Adjacency SIDs together.
f1Mpls := f1.Packet().Add().Mpls()
f1Mpls.Label().SetValue(uint32(srStartingSid + sid2Off))
f1Mpls.TrafficClass().SetValues([]uint32{1, 2})

f1Ip := f1.Packet().Add().Ipv4()
f1Ip.Src().SetValue("21.1.1.1")
f1Ip.Dst().SetValue("22.1.1.1")

// P2 ---> P1
f2 := config.Flows().Items()[1]
flowName = fmt.Sprint("p2 --> p1 flow", 2)
TxName = fmt.Sprint("MPLS Traffic Label Learned at P2", 2)
f2.SetName(flowName).
	TxRx().Device().
	SetTxNames([]string{TxName}).
	SetRxNames([]string{d1IsisRoute1.Name()})

f2Eth := f2.Packet().Add().Ethernet()
f2Eth.Src().SetValue(d2Eth1.Mac())
f2Eth.Dst().Auto()
   
     // Configuring static Node SID that will be advertised by ISIS Router on Port P1  
    // However, we can configure with array of Node and Adjacency SIDs together.
f2Mpls := f2.Packet().Add().Mpls()
f2Mpls.Label().SetValue(uint32(srStartingSid + sid1Off))
f2Mpls.TrafficClass().SetValues([]uint32{3, 4})

f2Ip := f2.Packet().Add().Ipv4()
f2Ip.Src().SetValue("22.1.1.1")
f2Ip.Dst().SetValue("21.1.1.1")