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RR vpnv4 route exchange o...

RR vpnv4 route exchange over RR

Created: Dec 2, 2018 13:59:56Latest reply: Dec 4, 2018 17:43:46 1242 6 0 0 0
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Hi friends 

i have quite a simple topology like below

topo
i need to do the folowing 
R1 and R4 they have vrf vrf_a
each one has a loop back interface bind in to the vrf
R1 and R4 they are RR clients of R5 
so i need them to exchange VRF routes over R5 
but mpls ldp is enabled only betwean R1 --- R2 ---- R3 ---- R4
no any mpls ldp betwean RR and RR clients

could some one help how to realise route exchange 
the topology and routers configuration is attahced

thanks 

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chenhui
Admin Created Dec 4, 2018 02:19:34

@user_3145393 hello sir, I checked your configuration, if you mean you find nothing shows by display bgp vpnv4 all routing-table on R5, please try undo policy vpn-target on R5
bgp 65000
ipv4-family vpnv4
undo policy vpn-target

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uzzi
uzzi HCIE Created Dec 2, 2018 15:30:25

Dear I am unable to download your configuration so I can verify it, ideally on RR both clients should be define in VPNV4 and on both RR clients peering should be up between RR and clients. secondly both client should have the respective VRF IPV4 family configuration and it should exchange all routes without any problem.

Kindest regards,
Uzair
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chenhui
chenhui Admin Created Dec 4, 2018 02:19:34

@user_3145393 hello sir, I checked your configuration, if you mean you find nothing shows by display bgp vpnv4 all routing-table on R5, please try undo policy vpn-target on R5
bgp 65000
ipv4-family vpnv4
undo policy vpn-target

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Mysterious.color
Mysterious.color Created Dec 4, 2018 09:13:14

That's very Helpful RR vpnv4 route exchange over RR-2814267-1
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paratrooper_123
paratrooper_123 Created Dec 4, 2018 17:36:50

Posted by cWX611640 at 2018-12-04 02:19 @user_3145393 hello sir, I checked your configuration, if you mean you find nothing shows by displa ...
hi men
thanks for your reply
it helps
now im able to see the routes reflected
but there is one problem . routes reflected from R4 to r1 and vise versa are not set into vrf routing table
please check the below output
R5 output
<Huawei>display bgp vpnv4 all routing-table 


 BGP Local router ID is 10.0.15.5 
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete



 Total number of routes from all PE: 2
 Route Distinguisher: 65000:100 


      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn

 *>i  11.11.11.11/32     1.1.1.1         0          100        0      ?
 *>i  44.44.44.44/32     4.4.4.4         0          100        0      ?
<Huawei>
here 44.44.44.44/32 is the network advertised by R4 and 11.11.11.11/32 is the network advertised by R1

please check the R1 output 
<Huawei>display bgp vpnv4 all routing-table 


 BGP Local router ID is 10.0.12.1 
 Status codes: * - valid, > - best, d - damped,
               h - history,  i - internal, s - suppressed, S - Stale
               Origin : i - IGP, e - EGP, ? - incomplete



 Total number of routes from all PE: 2
 Route Distinguisher: 65000:100 


      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn

 *>   11.11.11.11/32     0.0.0.0         0                     0      ?
 *>i  44.44.44.44/32     4.4.4.4         0          100        0      ?

 VPN-Instance vpn_a, Router ID 10.0.12.1:

 Total Number of Routes: 2
      Network            NextHop        MED        LocPrf    PrefVal Path/Ogn

 *>   11.11.11.11/32     0.0.0.0         0                     0      ?
   i  44.44.44.44/32     4.4.4.4         0          100        0      ?
<Huawei>
as you can see on R1 44.44.44.44/32 is not the best path and thus it is not installed into vrf vpn_a routing table 
<Huawei>display ip routing-table vpn-instance vpn_a
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: vpn_a
         Destinations : 1        Routes : 1        

Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

    11.11.11.11/32  Direct  0    0           D   127.0.0.1       LoopBack11

<Huawei>

<Huawei>display bgp vpnv4 all routing-table 44.44.44.44 


 BGP local router ID : 10.0.12.1
 Local AS number : 65000

 Total routes of Route Distinguisher(65000:100): 1
 BGP routing table entry information of 44.44.44.44/32:
 Label information (Received/Applied): 1024/NULL
 From: 5.5.5.5 (10.0.15.5)
 Route Duration: 00h13m35s  
 Relay IP Nexthop: 10.0.15.5
 Relay IP Out-Interface: Ethernet0/0/1
 Relay Tunnel Out-Interface: 
 Relay token: 0x0
 Original nexthop: 4.4.4.4
 Qos information : 0x0
 Ext-Community:RT <65000 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, intern
al, best, select, pre 255, IGP cost 2
 Originator:  10.0.34.4
 Cluster list: 10.0.15.5
 Not advertised to any peer yet


 VPN-Instance vpn_a, Router ID 10.0.12.1:

 Total Number of Routes: 1
 BGP routing table entry information of 44.44.44.44/32:
 Label information (Received/Applied): 1024/NULL
 From: 5.5.5.5 (10.0.15.5)
 Route Duration: 00h13m35s  
 Relay Tunnel Out-Interface: 
 Relay token: 0x0
 Original nexthop: 4.4.4.4
 Qos information : 0x0
 Ext-Community:RT <65000 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, internal, pre
 255
 Originator:  10.0.34.4
 Cluster list: 10.0.15.5
 Not advertised to any peer yet
 

The same is true for R4 output related to reflected 11.11.11.11/32 prefix
Could you please chek what should be done to resolve this  ??



PS the next hope address 4.4.4.4 for advertised 44.44.44.44/32 is reachable from R1

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paratrooper_123
paratrooper_123 Created Dec 4, 2018 17:37:15

hi men
thanks for your reply
it helps
now im able to see the routes reflected
but there is one problem . routes reflected from R4 to r1 and vise versa are not set into vrf routing table
please check the below output
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paratrooper_123
paratrooper_123 Created Dec 4, 2018 17:43:46

Posted by uzzi at 2018-12-02 15:30 Dear I am unable to download your configuration so I can verify it, ideally on RR both clients shoul ...
hi
yes evrything exists as you said
cWX611640 mentioned below that
undo policy vpn-trget is required
after i added this command looks like RR started to reflect routes but
on the RR clients R1 and R4 they are not the best routes and not inserted into vrf vpn_a routing table
please check my post below
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