Flow Specification

GoBGP supports RFC5575, RFC7674, draft-ietf-idr-flow-spec-v6 and draft-ietf-idr-flowspec-l2vpn.

Prerequisites

Configuration

To enable FlowSpec family, please enumerate the corresponding "afi-safi-name" in "neighbors.afi-safis" section like the below.

[[neighbors]]
  # ...(snip)...
  [[neighbors.afi-safis]]
    [neighbors.afi-safis.config]
      afi-safi-name = "ipv4-flowspec"
  [[neighbors.afi-safis]]
    [neighbors.afi-safis.config]
      afi-safi-name = "ipv6-flowspec"
  [[neighbors.afi-safis]]
    [neighbors.afi-safis.config]
      afi-safi-name = "l3vpn-ipv4-flowspec"
  [[neighbors.afi-safis]]
    [neighbors.afi-safis.config]
      afi-safi-name = "l3vpn-ipv6-flowspec"
  [[neighbors.afi-safis]]
    [neighbors.afi-safis.config]
      afi-safi-name = "l2vpn-flowspec"
  # ...(snip)...

CLI Syntax

IPv4/IPv6 FlowSpec

# Add a route
$ gobgp global rib -a {ipv4-flowspec|ipv6-flowspec} add match <MATCH> then <THEN>
    <MATCH> : { destination <PREFIX> [<OFFSET>] |
                source <PREFIX> [<OFFSET>] |
                protocol <PROTOCOLS>... |
                fragment <FRAGMENTS>... |
                tcp-flags <TCP_FLAGS>... |
                port <ITEM>... |
                destination-port <ITEM>... |
                source-port <ITEM>... |
                icmp-type <ITEM>... |
                icmp-code <ITEM>... |
                packet-length <ITEM>... |
                dscp <ITEM>... |
                label <ITEM>... }...
    <PROTOCOLS> : [&] [<|<=|>|>=|==|!=] <PROTOCOL>
    <PROTOCOL> : egp, gre, icmp, igmp, igp, ipip, ospf, pim, rsvp, sctp, tcp, udp, unknown, <DEC_NUM>
    <FRAGMENTS> : [&] [=|!|!=] <FRAGMENT>
    <FRAGMENT> : dont-fragment, is-fragment, first-fragment, last-fragment, not-a-fragment
    <TCP_FLAGS> : [&] [=|!|!=] <TCP_FLAG>
    <TCP_FLAG> : F, S, R, P, A, U, E, C
    <ITEM> : [&] [<|<=|>|>=|==|!=] <DEC_NUM>
    <THEN> : { accept |
               discard |
               rate-limit <RATE> [as <AS>] |
               redirect <RT> |
               mark <DEC_NUM> |
               action { sample | terminal | sample-terminal } }...
    <RT> : xxx:yyy, xxx.xxx.xxx.xxx:yyy, xxxx::xxxx:yyy, xxx.xxx:yyy

# Show routes
$ gobgp global rib -a {ipv4-flowspec|ipv6-flowspec}

# Delete route
$ gobgp global rib -a {ipv4-flowspec|ipv6-flowspec} del match <MATCH_EXPR>

VPNv4/VPNv6 FlowSpec

# Add a route
$ gobgp global rib -a {ipv4-l3vpn-flowspec|ipv6-l3vpn-flowspec} add rd <RD> match <MATCH> then <THEN> [rt <RT>]
    <RD> : xxx:yyy, xxx.xxx.xxx.xxx:yyy, xxx.xxx:yyy
    <MATCH> : { destination <PREFIX> [<OFFSET>] |
                source <PREFIX> [<OFFSET>] |
                protocol <PROTOCOLS>... |
                fragment <FRAGMENTS>... |
                tcp-flags <TCP_FLAGS>... |
                port <ITEM>... |
                destination-port <ITEM>... |
                source-port <ITEM>... |
                icmp-type <ITEM>... |
                icmp-code <ITEM>... |
                packet-length <ITEM>... |
                dscp <ITEM>... |
                label <ITEM>...}...
    <PROTOCOLS> : [&] [<|<=|>|>=|==|!=] <PROTOCOL>
    <PROTOCOL> : egp, gre, icmp, igmp, igp, ipip, ospf, pim, rsvp, sctp, tcp, udp, unknown, <DEC_NUM>
    <FRAGMENTS> : [&] [=|!|!=] <FRAGMENT>
    <FRAGMENT> : dont-fragment, is-fragment, first-fragment, last-fragment, not-a-fragment
    <TCP_FLAGS> : [&] [=|!|!=] <TCP_FLAG>
    <TCP_FLAG> : F, S, R, P, A, U, E, C
    <ITEM> : [&] [<|<=|>|>=|==|!=] <DEC_NUM>
    <THEN> : { accept |
               discard |
               rate-limit <RATE> [as <AS>] |
               redirect <RT> |
               mark <DEC_NUM> |
               action { sample | terminal | sample-terminal } }...
    <RT> : xxx:yyy, xxx.xxx.xxx.xxx:yyy, xxxx::xxxx:yyy, xxx.xxx:yyy

# Show routes
$ gobgp global rib -a {ipv4-l3vpn-flowspec|ipv6-l3vpn-flowspec}

# Delete route
$ gobgp global rib -a {ipv4-l3vpn-flowspec|ipv6-l3vpn-flowspec} del rd <RD> match <MATCH_EXPR>

L2VPN FlowSpec

# Add a route
$ gobgp global rib -a l2vpn-flowspec add rd <RD> match <MATCH> then <THEN> [rt <RT>]
    <RD> : xxx:yyy, xxx.xxx.xxx.xxx:yyy, xxx.xxx:yyy
    <MATCH> : { destination <PREFIX> [<OFFSET>] |
                source <PREFIX> [<OFFSET>] |
                protocol <PROTOCOLS>... |
                fragment <FRAGMENTS>... |
                tcp-flags <TCP_FLAGS>... |
                port <ITEM>... |
                destination-port <ITEM>... |
                source-port <ITEM>... |
                icmp-type <ITEM>... |
                icmp-code <ITEM>... |
                packet-length <ITEM>... |
                dscp <ITEM>... |
                label <ITEM>... |
                destination-mac <MAC_ADDRESS> |
                source-mac <MAC_ADDRESS> |
                ether-type <ETHER_TYPES>... |
                llc-dsap <ITEM>... |
                llc-ssap <ITEM>... |
                llc-control <ITEM>... |
                snap <ITEM>... |
                vid <ITEM>... |
                cos <ITEM>... |
                inner-vid <ITEM>... |
                inner-cos <ITEM>... }...
    <PROTOCOLS> : [&] [<|<=|>|>=|==|!=] <PROTOCOL>
    <PROTOCOL> : egp, gre, icmp, igmp, igp, ipip, ospf, pim, rsvp, sctp, tcp, udp, unknown, <DEC_NUM>
    <FRAGMENTS> : [&] [=|!|!=] <FRAGMENT>
    <FRAGMENT> : dont-fragment, is-fragment, first-fragment, last-fragment, not-a-fragment
    <TCP_FLAGS> : [&] [=|!|!=] <TCP_FLAG>
    <TCP_FLAG> : F, S, R, P, A, U, E, C
    <ETHER_TYPES> : [&] [<|<=|>|>=|==|!=] <ETHER_TYPE>
    <ETHER_TYPE> : aarp, apple-talk, arp, ipv4, ipv6, ipx, loopback, net-bios, pppoe-discovery, pppoe-session, rarp, snmp, vmtp, xtp, <DEC_NUM>
    <ITEM> : [&] [<|<=|>|>=|==|!=] <DEC_NUM>
    <THEN> : { accept |
               discard |
               rate-limit <RATE> [as <AS>] |
               redirect <RT> |
               mark <DEC_NUM> |
               action { sample | terminal | sample-terminal } }...
    <RT> : xxx:yyy, xxx.xxx.xxx.xxx:yyy, xxxx::xxxx:yyy, xxx.xxx:yyy

# Show routes
$ gobgp global rib -a l2vpn-flowspec

# Delete route
$ gobgp global rib -a l2vpn-flowspec del rd <RD> match <MATCH_EXPR>

Match (Traffic Filtering Rules)

Type	Key	Operator/Operand Type	Value
1	destination	-	IP Prefix (or IP Address).
2	source	-	IP Prefix (or IP Address).
3	protocol	Numeric	Protocol name, decimal number, `true` or `false`.
4	port	Numeric	Decimal number, `true` or `false`.
5	destination-port	Numeric	Decimal number, `true` or `false`.
6	source-port	Numeric	Decimal number, `true` or `false`.
7	icmp-type	Numeric	Decimal number, `true` or `false`.
8	icmp-code	Numeric	Decimal number, `true` or `false`.
9	tcp-flags	Bitmask	TCP flag or its combination.
10	packet-length	Numeric	Decimal number, `true` or `false`.
11	dscp	Numeric	Decimal number, `true` or `false`.
12	fragment	Bitmask	Fragment type or its combination joined with `+`.
13	label	Numeric	Decimal number, `true` or `false`.
14	ether-type	Numeric	Ethernet type name, decimal number, `true` or `false`.
15	source-mac	-	MAC address.
16	destination-mac	-	MAC address.
17	llc-dsap	Numeric	Decimal number, `true` or `false`.
18	llc-ssap	Numeric	Decimal number, `true` or `false`.
19	llc-control	Numeric	Decimal number, `true` or `false`.
20	snap	Numeric	Decimal number, `true` or `false`.
21	vid	Numeric	Decimal number, `true` or `false`.
22	cos	Numeric	Decimal number, `true` or `false`.
23	inner-vid	Numeric	Decimal number, `true` or `false`.
24	inner-cos	Numeric	Decimal number, `true` or `false`.

Note: IPv4/VPNv4 FlowSpec families support types 1-12, IPv6/VPNv6 FlowSpec families support types 1-13 and L2VPN FlowSpec family supports types 1-24.

Operator/Operand Types

Type	Value
Numeric	[&] [== \| > \| >= \| < \| <= \| !=]
Bitmask	[&] [= \| ! \| !=]

Note: For the decimal type values (e.g., port), you can combine the following operators and the reserved values. The following complies with draft-ietf-idr-rfc5575.

lt	gt	eq	Operator/Value
0	0	0	`true` (no operator and independent of the value)
0	0	1	==
0	1	0	>
0	1	1	>=
1	0	0	<
1	0	1	<=
1	1	0	!=
1	1	1	`false` (no operator and independent of the value)

Note: For the bitmask operand, RFC5575 says "=value" and "value" is the different in the bitwise match operation. With "=value", it is evaluated as "(data & value) == value"; with "value" (without "="), "data & value" evaluates to TRUE if any of the bits in the value mask are set in the data.

Example - Destination Prefix

Key	Value
destination	IP Prefix (or IP Address)

# gobgp global rib -a ipv4-flowspec add match destination <IPv4 Prefix> then <THEN>
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then accept
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?}]

# If IPv4 address is specified, it will be treated as /32 prefix
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.1 then accept
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.1/32] fictitious                                00:00:00   [{Origin: ?}]

# gobgp global rib -a ipv6-flowspec add match destination <IPv6 Prefix> [OFFSET] then <THEN>
$ gobgp global rib -a ipv6-flowspec add match destination 2001:db8:1::/64 then accept
$ gobgp global rib -a ipv6-flowspec
   Network                          Next Hop             AS_PATH              Age        Attrs
*> [destination: 2001:db8:1::/64/0] fictitious                                00:00:00   [{Origin: ?}]

# With prefix offset
$ gobgp global rib -a ipv6-flowspec add match destination 2001:db8:1::/64 32 then accept
$ gobgp global rib -a ipv6-flowspec
   Network                           Next Hop             AS_PATH              Age        Attrs
*> [destination: 2001:db8:1::/64/32] fictitious                                00:00:00   [{Origin: ?}]

# As with IPv4 address, if IPv6 address is specified, it will be treated as /128 prefix
$ gobgp global rib -a ipv6-flowspec add match destination 2001:db8:1::1 then accept
$ gobgp global rib -a ipv6-flowspec
   Network                            Next Hop             AS_PATH              Age        Attrs
*> [destination: 2001:db8:1::1/128/0] fictitious                                00:00:00   [{Origin: ?}]

Example - IP Protocol/Next Header

Key	Operator	Value
protocol	[&] [== \| > \| >= \| < \| <= \| !=]	Protocol name, decimal number, `true` or `false`.

Supported Protocol Names: icmp, igmp, tcp, egp, igp, udp, rsvp, gre, ospf, ipip, pim, sctp.

# gobgp global rib -a ipv4-flowspec add match protocol <Protocol> then <THEN>
$ gobgp global rib -a ipv4-flowspec add match protocol tcp then accept
$ gobgp global rib -a ipv4-flowspec
   Network              Next Hop             AS_PATH              Age        Attrs
*> [protocol: ==tcp]    fictitious                                00:00:00   [{Origin: ?}]

# Combination of rules
# Note: "true" or "false" should be the last of rule without operator
$ gobgp global rib -a ipv4-flowspec add match protocol '==tcp &=udp icmp >igmp >=egp <igp <=rsvp !=gre &!ospf true' then accept
$ gobgp global rib -a ipv4-flowspec
   Network                                                                  Next Hop             AS_PATH              Age        Attrs
*> [protocol: ==tcp&==udp ==icmp >igmp >=egp <igp <=rsvp !=gre&!=ospf true] fictitious                                00:00:00   [{Origin: ?}]

Example - Port

Key	Operator	Value
port	[&] [== \| > \| >= \| < \| <= \| !=]	Decimal number, `true` or `false`

# gobgp global rib -a ipv4-flowspec add match port <Port> then <THEN>
$ gobgp global rib -a ipv4-flowspec add match port 80 then accept
$ gobgp global rib -a ipv4-flowspec
   Network              Next Hop             AS_PATH              Age        Attrs
*> [port: ==80]         fictitious                                00:00:00   [{Origin: ?}]

# Combination of rules
# Note: "true" or "false" should be the last of rule without operator
$ gobgp global rib -a ipv4-flowspec add match port '==80 &=90 8080 >9090 >=10080 <10090 <=18080 !=19090 &!443 true' then accept
$ gobgp global rib -a ipv4-flowspec
   Network                                                                  Next Hop             AS_PATH              Age        Attrs
*> [port: ==80&==90 ==8080 >9090 >=10080 <10090 <=18080 !=19090&!=443 true] fictitious                                00:00:00   [{Origin: ?}]

Example - TCP flags

Key	Operand	Value
tcp-flags	[&] [= \| ! \| !=]	TCP flag or its combination.

Supported TCP Flags: F (=FIN), S (=SYN), R (=RST), P (=PUSH), A (=ACK), U (=URGENT), C (=CWR), E (=ECE).

# gobgp global rib -a ipv4-flowspec add match tcp-flags <TCP Flags> then <THEN>
$ gobgp global rib -a ipv4-flowspec add match tcp-flags SA then accept
$ gobgp global rib -a ipv4-flowspec
   Network              Next Hop             AS_PATH              Age        Attrs
*> [tcp-flags: SA]      fictitious                                00:00:00   [{Origin: ?}]

# Combination of rules
# Note: '=!C' will be converted to '!=C' for the backward compatibility
$ gobgp global rib -a ipv4-flowspec add match tcp-flags '==S &=SA A !F !=U =!C' then accept
$ gobgp global rib -a ipv4-flowspec
   Network                          Next Hop             AS_PATH              Age        Attrs
*> [tcp-flags: =S&=SA A !F !=U !=C] fictitious                                00:00:00   [{Origin: ?}]

Example - Fragment

Key	Operand	Value
fragment	[&] [= \| ! \| !=]	Fragment type or its combination joined with `+`.

Supported Fragment Types: not-a-fragment, dont-fragment, is-fragment, first-fragment, last-fragment.

# gobgp global rib -a ipv4-flowspec add match fragment <Fragment> then <THEN>
$ gobgp global rib -a ipv4-flowspec add match fragment dont-fragment then accept
$ gobgp global rib -a ipv4-flowspec
   Network                   Next Hop             AS_PATH              Age        Attrs
*> [fragment: dont-fragment] fictitious                                00:00:00   [{Origin: ?}]

# Combination of rules
$ gobgp global rib -a ipv4-flowspec add match fragment dont-fragment is-fragment+first-fragment then accept
$ gobgp global rib -a ipv4-flowspec
   Network                                              Next Hop             AS_PATH              Age        Attrs
*> [fragment: dont-fragment is-fragment+first-fragment] fictitious                                00:00:00   [{Origin: ?}]

Example - Ethernet Type

Key	Operand	Value
ether-type	[&] [== \| > \| >= \| < \| <= \| !=]	Ethernet type name, decimal number, `true` or `false`.

Supported Ethernet Type Names: ipv4, arp, rarp, vmtp, apple-talk, aarp, ipx, snmp, net-bios, xtp, ipv6, pppoe-discovery, pppoe-session, loopback.

# gobgp global rib -a l2vpn-flowspec add rd <RD> match ether-type <Ethernet Type> then <THEN>
$ gobgp global rib -a l2vpn-flowspec add rd 65000:100 match ether-type arp then accept
$ gobgp global rib -a l2vpn-flowspec
   Network                            Next Hop             AS_PATH              Age        Attrs
*> [rd: 65000:100][ether-type: ==arp] fictitious                                00:00:00   [{Origin: ?}]

Example - Source MAC

Key	Value
source-mac	MAC Address.

# gobgp global rib -a l2vpn-flowspec add rd <RD> match source-mac <MAC Address> then <THEN>
$ gobgp global rib -a l2vpn-flowspec add rd 65000:100 match source-mac aa:bb:cc:dd:ee:ff then accept
$ gobgp global rib -a l2vpn-flowspec
   Network                                        Next Hop             AS_PATH              Age        Attrs
*> [rd: 65000:100][source-mac: aa:bb:cc:dd:ee:ff] fictitious                                00:00:00   [{Origin: ?}]

Then (Traffic Filtering Actions)

Type	Action	Description
-	accept	Accept the traffic.
0x8006	discard	Discard the traffic using traffic-rate of 0.
0x8006	rate-limit <RATE> [as <AS>]	Specify the rate of traffic in float value.
0x8007	action sample	Enables the traffic sampling and logging.
0x8007	action terminal	Specify the termination of the traffic filter.
0x8007	action sample-terminal	Specify both of sample and terminal.
0x8008	redirect <RT>	Redirect to VRF which has the given RT in its import policy.
0x8009	mark <VALUE>	Modifies the DSCP in IPv4 or Traffic Class in IPv6 with the given value.

Example - accept/discard

# accept action
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then accept
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?}]


# discard action
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then discard
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [discard]}]

Example - rate-limit

$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then rate-limit 100.0
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [rate: 100.000000]}]

# With the informational AS number
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then rate-limit 100.0 as 65000
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [rate: 100.000000(as: 65000)]}]

Example - action

# sample action
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then action sample
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [action: sample]}]

# terminal action
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then action terminal
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [action: terminal]}]

# sample-terminal action
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then action sample-terminal
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [action: terminal-sample]}]

Example - redirect

# with Two Octet AS specific RT
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then redirect 65000:100
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [redirect: 65000:100]}]

# with IPv4 address specific RT
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then redirect 1.1.1.1:100
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [redirect: 1.1.1.1:100]}]

# with IPv6 address specific RT
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then redirect 2001:db8::1:100
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [redirect: 2001:db8::1:100]}]

# with Four Octet AS specific RT
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then redirect 200.200:100
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [redirect: 200.200:100]}]

Example - mark

$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 then mark 10
$ gobgp global rib -a ipv4-flowspec
   Network                    Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [remark: 10]}]

Example of Combinations of Rules and Actions

# add a flowspec rule which redirect flows whose dst 10.0.0.0/24 and src 20.0.0.0/24 to VRF with RT 10:10
$ gobgp global rib -a ipv4-flowspec add match destination 10.0.0.0/24 source 20.0.0.0/24 then redirect 10:10
$ gobgp global rib -a ipv4-flowspec
   Network                                         Next Hop             AS_PATH              Age        Attrs
*> [destination: 10.0.0.0/24][source: 20.0.0.0/24] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [redirect: 10:10]}]

# add a flowspec rule which discard flows whose dst 2001::2/128 and port equals 80 and with TCP flags not match SA (SYN/ACK) and not match U (URG)
$ gobgp global rib -a ipv6-flowspec add match destination 2001::2/128 port '==80' tcp-flags '!=SA&!=U' then discard
$ gobgp global rib -a ipv6-flowspec
   Network                                                       Next Hop             AS_PATH              Age        Attrs
*> [destination: 2001::2/128/0][port: ==80][tcp-flags: !=SA&!=U] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [discard]}]

# add another flowspec rule which discard flows whose
# - ip protocol is tcp
# - destination port is 80 or greater than or equal to 8080 and lesser than or equal to 8888
# - packet is a first fragment or a last fragment
$ gobgp global rib -a ipv4-flowspec add match protocol tcp destination-port '==80' '>=8080&<=8888' fragment '=first-fragment =last-fragment' then discard
$ gobgp global rib -a ipv4-flowspec
   Network                                                                                           Next Hop             AS_PATH              Age        Attrs
*> [protocol: ==tcp][destination-port: ==80 >=8080&<=8888][fragment: =first-fragment =last-fragment] fictitious                                00:00:00   [{Origin: ?} {Extcomms: [discard]}]

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flowspec.md

flowspec.md

Flow Specification

Prerequisites

Contents

Configuration

CLI Syntax

IPv4/IPv6 FlowSpec

VPNv4/VPNv6 FlowSpec

L2VPN FlowSpec

Match (Traffic Filtering Rules)

Operator/Operand Types

Example - Destination Prefix

Example - IP Protocol/Next Header

Example - Port

Example - TCP flags

Example - Fragment

Example - Ethernet Type

Example - Source MAC

Then (Traffic Filtering Actions)

Example - accept/discard

Example - rate-limit

Example - action

Example - redirect

Example - mark

Example of Combinations of Rules and Actions

Files

flowspec.md

Latest commit

History

flowspec.md

File metadata and controls

Flow Specification

Prerequisites

Contents

Configuration

CLI Syntax

IPv4/IPv6 FlowSpec

VPNv4/VPNv6 FlowSpec

L2VPN FlowSpec

Match (Traffic Filtering Rules)

Operator/Operand Types

Example - Destination Prefix

Example - IP Protocol/Next Header

Example - Port

Example - TCP flags

Example - Fragment

Example - Ethernet Type

Example - Source MAC

Then (Traffic Filtering Actions)

Example - accept/discard

Example - rate-limit

Example - action

Example - redirect

Example - mark

Example of Combinations of Rules and Actions