The configuration of BGP4+ Routing Reflect In MSR Series

The configuration of BGP4+ Routing Reflect In MSR Series

 

 

Keywords: MSR;BGP4+;IPv6;Routing Reflect

I            Requirement for the diagram

A package updated by EBGP received by RouterB, and then trasfer to RouterC. Router C is the Reflector, it has two RouterB and RouterD. There isn't connect of IBGP, every routing update info will be trasfer from one side to the other by RouterC.

Device List: RTA,RTB,RTC,RTD

CMW Version: Version 5.20, Beta 1105  

II          Network topology

Figure 1-1 BGP4+ Routing Reflect

III        Steps of configuration

RouterA

#  ipv6 # interface Ethernet0/1  port link-mode route  ipv6 address 1::1/96 # interface NULL0 # interface LoopBack0  ipv6 address 1:1:1::1/128 #              bgp 100  undo synchronization  #  ipv6-family //Release routing info of this subnet，here is the loopback0  network 1:1:1::1 128  undo synchronization  //Set up EBGP peer  peer 1::2 as-number 200

RouterB

#  ipv6 # interface Ethernet0/0  port link-mode route  ipv6 address 2::1/96 # interface Ethernet0/1  port link-mode route  ipv6 address 1::2/96 # interface LoopBack0  ipv6 address 2:2:2::2/128 # bgp 200 undo synchronization # ipv6-family   network 2:2:2::2 128 //Import direct routing import-route direct undo synchronization //Tip: there is no RouterD as a peer here peer 1::1 as-number 100 peer 2::2 as-number 200

RouterC

#  ipv6 # interface LoopBack0  ipv6 address 3:3:3::3/128 # interface GigabitEthernet0/0  port link-mode route  ipv6 address 2::2/96 # interface GigabitEthernet0/1  port link-mode route  ipv6 address 3::1/96 //configuration of BGP # bgp 200 undo synchronization #             ipv6-family network 3:3:3::3 128 import-route direct undo synchronization group alanker internal //Set all the peer of this group as the clients of reflector peer alanker reflect-client peer 2::1 group alanker peer 3::2 group alanker

RouterD

#  ipv6 # interface LoopBack0  ipv6 address 4:4:4::4/128 # interface GigabitEthernet0/0  port link-mode route  ipv6 address 3::2/96  ip address 1.0.0.4 255.255.255.0 # interface GigabitEthernet0/1  port link-mode route # bgp 200 undo synchronization # ipv6-family network 4:4:4::4 128 import-route direct undo synchronization peer 3::1 as-number 200

 

IV       Key notes in the configuration

1) On RouterB and RouterD, need not config reflect-client，all of this only config on RouterC;

2) Need import direct routing on RouterB and RouterC, otherwise, when ping 1:1:1:1, there will lost the next hop 1::1.

V         Result Check

1) Config another loopback address 2001：da8::1 in RouterA, and network this address under  BGP view:

[RouterA-2021-bgp-af-ipv6]dis th

#

 ipv6-family

  network 1:1:1::1 128

  network 2001:DA8::1 128

      undo synchronization

      peer 1::2 as-number 200

 

There has the routing in routing table of BGP in both RouterB and RouterD:

<RouterB-2020>display bgp ipv6 routing-table

 

 Total Number of Routes: 9

 

 BGP Local router ID is 1.0.0.2

 Status codes: * - valid, > - best, d - damped,

               h - history, i - internal, s - suppressed, S - Stale

               Origin : i - IGP, e - EGP, ? - incomplete

 

 *> Network : 1::                                PrefixLen : 96   

     NextHop : 1::2                               LocPrf   :        

     PrefVal : 0                                  Label    : NULL    

     MED    : 0                                      

     Path/Ogn: ?

 

 *> Network : 1:1:1::1                          PrefixLen : 128  

     NextHop : 1::1                              LocPrf   :        

     PrefVal : 0                                Label    : NULL    

     MED    : 0                                      

     Path/Ogn: 100 i

 

 *> Network : 2::                               PrefixLen : 96   

     NextHop : 2::1                              LocPrf   :         

     PrefVal : 0                                 Label    : NULL    

     MED    : 0                                      

     Path/Ogn: ?

 

 * i Network : 2::                               PrefixLen : 96   

     NextHop : 2::2                              LocPrf   : 100     

     PrefVal : 0                                 Label    : NULL    

     MED    : 0                                      

     Path/Ogn: ?

 

 *> Network : 2:2:2::2                         PrefixLen : 128  

     NextHop : ::1                               LocPrf   :        

     PrefVal : 0                                  Label    : NULL    

     MED    : 0                                      

     Path/Ogn: i

 

 *>i Network : 3::                               PrefixLen : 96   

     NextHop : 2::2                              LocPrf   : 100     

     PrefVal : 0                                 Label    : NULL    

     MED    : 0                                      

     Path/Ogn: ?

 

 *>i Network : 3:3:3::3                          PrefixLen : 128  

     NextHop : 2::2                              LocPrf   : 100     

     PrefVal : 0                                 Label    : NULL    

     MED    : 0                                      

     Path/Ogn: i

 

 *>i Network : 4:4:4::4                           PrefixLen : 128  

     NextHop : 3::2                               LocPrf   : 100     

     PrefVal : 0                                  Label    : NULL    

     MED    : 0                                       

     Path/Ogn: i

 

 *> Network : 2001:DA8::1                      PrefixLen : 128  

     NextHop : 1::1                             LocPrf   :        

     PrefVal : 0                                Label    : NULL    

     MED    : 0                                       

     Path/Ogn: 100 i

 

The address can be reached from D:

    <RouterD-3020>ping ipv6 2001:da8::1

  PING 2001:da8::1 : 56  data bytes, press CTRL_C to break

    Reply from 2001:DA8::1

    bytes=56 Sequence=1 hop limit=62 time = 3 ms

    Reply from 2001:DA8::1

    bytes=56 Sequence=2 hop limit=62 time = 3 ms

    Reply from 2001:DA8::1

    bytes=56 Sequence=3 hop limit=62 time = 3 ms

    Reply from 2001:DA8::1

    bytes=56 Sequence=4 hop limit=62 time = 4 ms

    Reply from 2001:DA8::1

    bytes=56 Sequence=5 hop limit=62 time = 3 ms

 

  --- 2001:da8::1 ping statistics ---

    5 packet(s) transmitted

    5 packet(s) received

    0.00% packet loss

    round-trip min/avg/max = 3/3/4 ms