Protocol Tests

Reference Documentation
Platform
Napatech SmartNIC
Content Type
Reference Information
Capture Software Version
Link™ Capture Software 12.6
Napatech Software Suite: Protocol Tests
Protocol Tests
Napatech Software Suite Documentation » NTPL

This section specifies the syntax and semantics for the protocol tests.

Supported Options Per Feature Set

Supported Feature Sets
N-ANL4 N-ANL5
N-ANL6
N-ANL7
N-ANL8 		N-ANL9 N-ANL10
  X X X
Options VXLAN     X X
EoMPLS       X

The syntax for the protocol tests is shown below.

<ProtocolTest>               ::= <EncapsulationTest> | <BroadcastTest> |
                                 <Layer2ProtocolTest> | <Layer3ProtocolTest> |
                                 <Layer4ProtocolTest> | <TunnelTypeTest> |
                                 <MacTypeTest> |<FragmentTest> |
                                 <IpProtocolTypeTest> | <InnerEncapsulationTest> |
                                 <InnerLayer2ProtocolTest> | <InnerLayer3ProtocolTest> |
                                 <InnerLayer4Test> | <InnerFragmentTest> |
                                 <InnerIpProtocolTypeTest>
<EncapsulationTest>          ::= 'Encapsulation' <EqualNotEqualTest> <EncapsulationListSpec>
<EncapsulationListSpec>      ::= <EncapsulationValue> [ ',' <EncapsulationListSpec> ]
<EncapsulationValue>         ::= 'ISL' | 'CFP' | 'VLAN' | 'MPLS' | 'VNTAG'
<BroadcastTest>              ::= 'BroadcastFrame' '==' <TrueFalseValue>
<Layer2ProtocolTest>         ::= 'Layer2Protocol' <EqualNotEqualTest> <Layer2ListSpec>
<Layer2ListSpec>             ::= <Layer2ProtocolValue> [ ',' <Layer2ListSpec> ]
<Layer2ProtocolValue>        ::= 'EtherII' | 'LLC' | 'SNAP' |  'Raw' | 'PPPoEDiscovery' |
                                 'PPPoESession' | 'Other'
<Layer3ProtocolTest>         ::= 'Layer3Protocol' <EqualNotEqualTest> <Layer3ListSpec>
<Layer3ListSpec>             ::= <Layer3ProtocolValue> [ ',' <Layer3ListSpec> ]
<Layer3ProtocolValue>        ::= 'IP' | 'IPV4' | 'IPV6' | 'Other'
<Layer4ProtocolTest>         ::= 'Layer4Protocol' <EqualNotEqualTest> <Layer4ListSpec>
<Layer4ListSpec>             ::= <Layer4ProtocolValue> [ ',' <Layer4ListSpec> ]
<Layer4ProtocolValue>        ::= 'UDP' | 'TCP' | 'ICMP' | 'SCTP' | 'Other'
<TunnelTypeTest>             ::= 'TunnelType' <EqualNotEqualTest> <TunnelTypeSpec>
<TunnelTypeSpec>             ::= <TunnelTypeValue> [ ',' <TunnelTypeSpec> ]
<TunnelTypeValue>            ::= 'GREv0' | 'GREv1' | 'GTPv0-U' | 'GTPv1-U' | 'GTPv1-C' | 'GTPv2-C' |
                                 'GTPv1v2-C' | 'GTPv1-U-GPDU' | 'GTPv1-U-Signal' |
                                 'IPinIP' | 'EtherIP' | 'VXLAN' | 'NVGRE' | 'EoMPLS' | 'Other'
<MacTypeTest>                ::= 'MacType' <EqualNotEqualTest> <MacTypeListSpec>
<MacTypeListSpec>            ::= <MacTypeValue> [ ',' <MacTypeListSpec> ]
<MacTypeValue>               ::= 'Pause' | 'Control' | 'Broadcast' | 'Multicast'| 'Unicast'
<FragmentTest>               ::= 'Fragment' <EqualNotEqualTest> <FragmentListSpec>
<FragmentListSpec>           ::= <FragmentValue> [ ',' <FragmentListSpec> ]
<FragmentValue>              ::= 'Not' | 'First' | 'Middle' | 'Last'
<IpProtocolTypeTest>         ::= 'IpProtocol' '==' <IpProtocolNumber>
<IpProtocolNumber>           ::= '0' | '1' | ...| '254'
<InnerEncapsulationTest>     ::= 'InnerEncapsulation' <EqualNotEqualTest> <InnerEncapsulationListSpec>
<InnerEncapsulationListSpec> ::= <InnerEncapsulationValue> [ ',' InnerEncapsulationListSpec> ]
<InnerEncapsulationValue>    ::= 'VLAN' | 'MPLS'
<InnerLayer2ProtocolTest>    ::= 'InnerLayer2Protocol' <EqualNotEqualTest> <InnerLayer2ListSpec>
<InnerLayer2ListSpec>        ::= <InnerLayer2ProtocolValue> [ ',' <InnerLayer2ListSpec>> ]
<InnerLayer2ProtocolValue>   ::= 'EtherII' | 'Other'
<InnerLayer3ProtocolTest>    ::= 'InnerLayer3Protocol' <EqualNotEqualTest> <InnerLayer3ListSpec>
<InnerLayer3ListSpec          ::= <InnerLayer3ProtocolValue> [ ',' <InnerLayer3ListSpec> ]
<InnerLayer3ProtocolValue>   ::= 'IP'| 'IPV4'| 'IPV6'| 'Other'
<InnerLayer4Test>            ::= 'InnerLayer4Protocol' <EqualNotEqualTest> <InnerLayer4ListSpec>
<InnerLayer4ListSpec>        ::= <InnerLayer4ProtocolValue> [ ',' <InnerLayer4ListSpec> ]
<InnerLayer4ProtocolValue>   ::= 'UDP' | 'TCP' | 'ICMP' | SCTP | 'Other'
<InnerFragmentTest>          ::= 'InnerFragment' <EqualNotEqualTest> <InnerFragmentListSpec>
<InnerFragmentListSpec>      ::= <InnerFragmentValue> [ ',' <InnerFragmentListSpec> ]
<InnerFragmentValue>         ::= 'Not' | 'First' | 'Middle' | 'Last'
<InnerIpProtocolTypeTest>    ::= 'InnerIpProtocol' '==' <InnerIpProtocolNumber>
<InnerIpProtocolNumber>      ::= '0' | '1' | ...| '254'

Using a protocol test it is possible to set up a filter, filtering frames with some specific protocol-related options. The options can be:

  • Specific protocols: Ether II, LLC, SNAP, Raw, IP, IPv4, IPv6, UDP, TCP or ICMP
  • Broadcast or nonbroadcast
  • Encapsulation: ISL, CFP, VLAN, or MPLS
  • Tunnel types related to tunneling

Protocol Test Example

This section describes an example of a filter for protocol testing. The example illustrates how to set up a filter that captures each frame that meets all of these conditions:

  • The frame is not VLAN-encapsulated
  • The frame is not MPLS-encapsulated
  • The frame is not an UDP frame

The filter NTPL example is shown below.

Assign[StreamId = 1] = ((Encapsulation != VLAN, MPLS) AND (Layer4Protocol != UDP))

MPLS Protocol Overview

The MPLS protocol consist of the following fields: 

 0 - 19 : Label
20 - 22 : TC = Traffic Class
     23 : S = Bottom of Stack
24 - 31 : TTL = Time To Live

The MPLS stack can hold multiple MPLS entries, the bottom header has the S bit set.

| Layer 2 header | MPLS top | ... | MPLS mid | ... | MPLS bottom | Layer 3 header |

When a node recieve a packet with a MPLS label, it utilize the top label to:

a) Forward the packet to the next hop.

b) The operation to be performed on the label stack before forwarding:

  • Replace the top label stack entry with another.
  • Pop an entry off the label stack.
  • Replace the top label stack entry.
  • Push one or more additional entries on the label stack.

MPLS Examples

This section show a few examples of MPLS filtering.

FilterMacros.txt define NTPL macros for the 3 highest MPLS headers:

MPLS0_Value : the label value for the top MPLS label.
MPLS1_Value : the label value for the second MPLS label.
MPLS2_Value : the label value for the third MPLS label.
MPLS0_Stack : the bottom stack flag for the top MPLS label.
MPLS1_Stack : the bottom stack flag for the second MPLS label.
MPLS2_Stack : the bottom stack flag for the third MPLS label.

Filter on MPLS and label value of 1234: 

Assign[StreamID=0]=Encapsulation == MPLS AND MPLS0_Value == 1234

Filter on MPLS bottom layer encapsulation with label value 5678. 

Assign[StreamID=1]=Encapsulation == MPLS AND MPLS0_Stack == 1 AND MPLS0_Value == 5678

Filter on MPLS encapsulation where the second label value is 4321 and the third layer is the bottom. 

Assign[StreamID=2]=Encapsulation == MPLS AND MPLS1_Value == 4321 AND MPLS2_Stack == 1