Example for Configuring Static BGP IPv6 Flow Specification

If the characteristics of DoS or DDoS attack traffic are known, use the static IPv6 BGP Flow Specification function by manually configuring BGP IPv6 Flow Specification routes to ensure network security.

Networking Requirements

As shown in Figure 1, Device A belongs to AS 100, while Device B, Device C, and Device D belong to AS 200. Device B is an ingress of AS 200. AS 200 communicates with AS 100 through Device B.

The attack source in AS 100 may flow into AS 200 through Device B, posing a threat to AS 200.

In this situation, configure static BGP IPv6 Flow Specification to address this problem. The operation process is as follows: Configure a BGP IPv6 Flow Specification route manually and establish a BGP IPv6 Flow Specification peer relationship between Device C and Device B as well as Device D and Device B. Then the route is sent to Device B to discard the attack traffic or limit its rate.

Figure 1 Configuring static BGP IPv6 Flow Specification

Interfaces 1 through 3 in this example represent GE 0/1/0, GE 0/1/8, and GE 0/1/16, respectively.



Precautions

None

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure OSPF on Device B, Device C, and Device D in AS 200 to enable them to communicate with each other.

  2. Configure a BGP IPv6 Flow Specification route FlowSpec1 manually on Device C to discard attack traffic with the source port ID of 159.

  3. Configure a BGP IPv6 Flow Specification route FlowSpec2 manually on Device D to limit the rate of attack traffic with the source port ID of 170.

  4. Establish BGP IPv6 Flow Specification peer relationships between Loopback interfaces of Device B and Device C as well as Device B and Device D. In this situation, BGP IPv6 Flow Specification routes can be sent to Device B where a traffic policy is generated.

Data Preparation

To complete the configuration, you need the following data:

  • Router ID of Device A (1.1.1.1), router ID of Device B (2.2.2.2), router ID of Device C (3.3.3.3), and router ID of Device D (4.4.4.4)

  • AS number (100) of Device A and AS number (200) of Device B, Device C, and Device D

Procedure

  1. Assign an IP address to each interface.

    For detailed configurations, see the configuration files in this example.

  2. Configure OSPF.

    For detailed configurations, see the configuration files in this example.

  3. Configure BGP connections.

    # Configure Device A.

    [~DeviceA] bgp 100
[*DeviceA-bgp] router-id 1.1.1.1
[*DeviceA-bgp] peer 10.10.1.2 as-number 200
[*Device-bgp] commit

    # Configure Device B.

    [~DeviceB] bgp 200
[*DeviceB-bgp] router-id 2.2.2.2
[*DeviceB-bgp] peer 10.10.1.1 as-number 100
[*DeviceB-bgp] peer 3.3.3.3 as-number 200
[*DeviceB-bgp] peer 3.3.3.3 connect-interface LoopBack1
[*DeviceB-bgp] peer 4.4.4.4 as-number 200
[*DeviceB-bgp] peer 4.4.4.4 connect-interface LoopBack1
[*DeviceB-bgp] commit

    # Configure Device C.

    [~DeviceC] bgp 200
[*DeviceC-bgp] router-id 3.3.3.3
[*DeviceC-bgp] peer 2.2.2.2 as-number 200
[*DeviceC-bgp] peer 2.2.2.2 connect-interface LoopBack1
[*DeviceC-bgp] commit

    # Configure Device D.

    [~DeviceD] bgp 200
[*DeviceD-bgp] router-id 4.4.4.4
[*DeviceD-bgp] peer 2.2.2.2 as-number 200
[*DeviceD-bgp] peer 2.2.2.2 connect-interface LoopBack1
[*DeviceD-bgp] commit

  4. Configure BGP IPv6 Flow Specification routes.

    # Configure Device C.

    [~DeviceC] flow-route FlowSpec1 ipv6
[*DeviceC-flow-route-ipv6] if-match source-port equal 159
[*DeviceC-flow-route-ipv6] apply deny
[*DeviceC-flow-route-ipv6] commit
[~DeviceC-flow-route-ipv6] quit

    # Configure Device D.

    [~DeviceD] flow-route FlowSpec2 ipv6
[*DeviceD-flow-route-ipv6] if-match source-port equal 170
[*DeviceD-flow-route-ipv6] apply traffic-rate 10000
[*DeviceD-flow-route-ipv6] commit
[~DeviceD-flow-route-ipv6] quit

  5. Establish a BGP IPv6 Flow Specification peer relationship.

    # Configure Device B.

    [~DeviceB]bgp 200
[*DeviceB-bgp] ipv6-family flow
[*DeviceB-bgp-af-ipv6-flow] peer 3.3.3.3 enable
[*DeviceB-bgp-af-ipv6-flow] peer 4.4.4.4 enable
[*DeviceB-bgp-af-ipv6-flow] commit
[~DeviceB-bgp-af-ipv6-flow] quit
[~DeviceB-bgp] quit

    # Configure Device C.

    [~DeviceC]bgp 200
[*DeviceC-bgp] ipv6-family flow
[*DeviceC-bgp-af-ipv6-flow] peer 2.2.2.2 enable
[*DeviceC-bgp-af-ipv6-flow] commit
[~DeviceC-bgp-af-ipv6-flow] quit
[~DeviceC-bgp] quit

    # Configure Device D.

    [~DeviceD]bgp 200
[*DeviceD-bgp] ipv6-family flow
[*DeviceD-bgp-af-ipv6-flow] peer 2.2.2.2 enable
[*DeviceD-bgp-af-ipv6-flow] commit
[~DeviceD-bgp-af-ipv6-flow] quit
[~DeviceD-bgp] quit

    The BGP IPv6 Flow Specification peer connections between Device B and other routers are successfully established.

  6. Verify the configuration.

    # Check BGP IPv6 Flow Specification peer connection status on Device B. BGP IPv6 Flow Specification peer relationships are successfully established.

    <DeviceB> display bgp flow ipv6 peer
 BGP local router ID : 2.2.2.2                                                  
 Local AS number : 200                                                          
 Total number of peers : 2                 Peers in established state : 2                        
  Peer            V          AS  MsgRcvd  MsgSent  OutQ  Up/Down          State  PrefRcv            
  3.3.3.3         4         200        6        5     0 01:38:07   Established        1            
  4.4.4.4         4         200        5        4     0 01:38:07   Established        1

    # Check BGP IPv6 Flow Specification routes received by Device B.

    <DeviceB> display bgp flow ipv6 routing-table
 BGP Local router ID is 2.2.2.2                                                 
 Status codes: * - valid, > - best, d - damped, x - best external, a - add path,
               h - history,  i - internal, s - suppressed, S - Stale            
               Origin : i - IGP, e - EGP, ? - incomplete                        
 RPKI validation codes: V - valid, I - invalid, N - not-found                   
                                                                                
 Total Number of Routes: 2                                                      
 * >  ReIndex : 1                                                               
      Dissemination Rules:                                                      
       Src. Port      : eq 170                                                  
       MED      : 0                   PrefVal  : 0                              
       LocalPref: 100                                                           
       Path/Ogn :  i                                                            
 * >  ReIndex : 2                                                               
      Dissemination Rules:                                                      
       Src. Port      : eq 159                                                  
       MED      : 0                   PrefVal  : 0                              
       LocalPref: 100                                                           
       Path/Ogn :  i

    # Check the traffic policy in each BGP IPv6 Flow Specification route based on the ReIndex shown in the preceding output.

    <DeviceB> display bgp flow ipv6 routing-table 2
 BGP local router ID : 2.2.2.2                                                  
 Local AS number : 200                                                          
 ReIndex : 2                                                                    
 Order   : 0                                                                    
 Dissemination Rules :                                                          
   Src. Port      : eq 159                                                      
                                                                                
 BGP flow-ipv6 routing table entry information of 2:                            
 Match action :                                                                 
   apply deny                                                                   
 From: 3.3.3.3 (3.3.3.3)                                                        
 Route Duration: 0d00h22m05s                                                    
 AS-path Nil, origin igp, MED 0, localpref 100, pref-val 0, valid, internal, best, pre 255                                                                      
 Not advertised to any peer yet

Configuration Files

  • Device A configuration file

    #
sysname DeviceA
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.10.1.1 255.255.255.0
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
bgp 100
 router-id 1.1.1.1
 peer 10.10.1.2 as-number 200
 #
 ipv4-family unicast
 undo synchronization
 peer 10.10.1.2 enable
#
return

  • Device B configuration file

    #
sysname DeviceB
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.10.1.2 255.255.255.0
#
interface GigabitEthernet0/1/8
undo shutdown
 ip address 10.2.1.1 255.255.255.0
#
interface GigabitEthernet0/1/16
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
#
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
#
bgp 200
 router-id 2.2.2.2
 peer 3.3.3.3 as-number 200
 peer 3.3.3.3 connect-interface LoopBack1
 peer 4.4.4.4 as-number 200
 peer 4.4.4.4 connect-interface LoopBack1
 peer 10.10.1.1 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  peer 3.3.3.3 enable
  peer 4.4.4.4 enable
  peer 10.10.1.1 enable
 #
 ipv6-family flow
  peer 3.3.3.3 enable
  peer 4.4.4.4 enable
#
ospf 1
 area 0.0.0.0
  network 2.2.2.2 0.0.0.0
  network 10.1.1.0 0.0.0.255
  network 10.2.1.0 0.0.0.255
#
return

  • Device C configuration file

    #
sysname DeviceC
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.2.1.2 255.255.255.0
#
interface LoopBack1
 ip address 3.3.3.3 255.255.255.255
#
bgp 200
 router-id 3.3.3.3
 peer 2.2.2.2 as-number 200
 peer 2.2.2.2 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  import-route direct
  peer 2.2.2.2 enable
 #
 ipv6-family flow
  peer 2.2.2.2 enable
#
ospf 1
 area 0.0.0.0
  network 3.3.3.3 0.0.0.0
  network 10.2.1.0 0.0.0.255
#
flow-route FlowSpec1 ipv6
 if-match source-port equal 159
 apply deny
#
return

  • Device D configuration file

    #
sysname DeviceD
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.2 255.255.255.0
#
interface LoopBack1
 ip address 4.4.4.4 255.255.255.255
#
bgp 200
 router-id 4.4.4.4
 peer 2.2.2.2 as-number 200
 peer 2.2.2.2 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  peer 2.2.2.2 enable
 #
 ipv6-family flow
  peer 2.2.2.2 enable
#
ospf 1
 area 0.0.0.0
  network 4.4.4.4 0.0.0.0
  network 10.1.1.0 0.0.0.255
#
flow-route FlowSpec2 ipv6
 if-match source-port equal 170
 apply traffic-rate 10000
#
return
Parent Topic: Configuration Examples for BGP Flow Specification
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
< Previous topic Next topic >