eBGP between xrv and Juniper Routers

[Saskiaaa]

Hello everyone,

i  configured   eBGP session between IOS XRV and VMX Routers, but still the BGP state on ACTIVE. can someone help me please to solve this problem.

Configurations in IOS XRV Router:

!

interface Loopback0

ipv4 address 10.100.100.3 255.255.255.255

!

interface MgmtEth0/RP0/CPU0/0

shutdown

!

interface GigabitEthernet0/0/0/0

ipv4 address 10.100.21.2 255.255.255.0

!

interface GigabitEthernet0/0/0/1

ipv4 address 10.100.20.2 255.255.255.0

!

interface GigabitEthernet0/0/0/2

ipv4 address 10.100.25.2 255.255.255.0

!

interface GigabitEthernet0/0/0/3

ipv4 address 10.100.26.1 255.255.255.0

!

interface GigabitEthernet0/0/0/4

ipv4 address 10.100.27.1 255.255.255.0

!

interface GigabitEthernet0/0/0/5

ipv4 address 10.100.25.1 255.255.255.0

router bgp 64522

bgp router-id 10.100.100.3

address-family ipv4 unicast

  network 10.100.100.3/32

!

neighbor 10.100.20.1

  remote-as 64533

  update-source Loopback0

!

neighbor 10.100.21.1

  remote-as 64533

  update-source Loopback0

!

!

end

-----------------

RP/0/RP0/CPU0:cisco1#show bgp summary   

Tue Mar 16 19:29:02.536 UTC

BGP router identifier 10.100.100.3, local AS number 64522

BGP generic scan interval 60 secs

Non-stop routing is enabled

BGP table state: Active

Table ID: 0xe0000000   RD version: 3

BGP main routing table version 3

BGP NSR Initial initsync version 3 (Reached)

BGP NSR/ISSU Sync-Group versions 0/0

BGP scan interval 60 secs

BGP is operating in STANDALONE mode.

Process       RcvTblVer   bRIB/RIB   LabelVer  ImportVer  SendTblVer  StandbyVer

Speaker               3          3          3          3           3           0

RP/0/RP0/CPU0:cisco1#show bgp table

Tue Mar 16 19:29:49.367 UTC

Neighbor        VRF                   Spk    AS   TblVer  InQ OutQ  St/PfxRcd

-----------------------------------------

Configurations in VMX Router:

    }

    lo0 {

        unit 0 {

            family inet {

                address 10.100.100.1/32;

            }

        }

    }

}

routing-options {                       

    autonomous-system 64533;

root@VMX1# run show configuration protocols bgp 

group external-peers {

    type external;

    peer-as 64522;

    neighbor 10.100.20.2;

    neighbor 10.100.21.2;

}

group internal-bgp {

    type internal;

    local-address 10.100.100.1;

    neighbor 10.100.100.2;

}

root@VMX1# run show bgp summary

Threading mode: BGP I/O

Groups: 2 Peers: 3 Down peers: 3

Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending

inet.0               

                       0          0          0          0          0          0

Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...

10.100.20.2           64522          0          0       0       0     4:23:33 Active

10.100.21.2           64522          0          0       0       0     4:23:33 Active

10.100.100.2          64533          0          0       0       0     1:01:30 Active

Thanks,

[Harold Ritter · Accepted solution]

Hi Saskiaaa,

There is a couple of things missing.

1. Since you want to establish the session to the directly connected IP address of the neighbor, you need to remove the "update-source Loopback0" from both neighbors on the XRv side.

2. You need to enable at least one address family on the XRv side and Juniper side as well.

XRv side:

neighbor 10.100.20.1

  address-family ipv4 unicast

neighbor 10.100.21.1

  address-family ipv4 unicast

Juniper side:

group external-peers {

    type external;

    peer-as 64522;

    neighbor 10.100.20.2;

    neighbor 10.100.21.2;

    family inet;

}

3. You need an ingress route policy by default in XR, but if this is a lab exercice you could disable the default behavior with the following configuration.

router bgp 64522

bgp unsafe-ebgp-policy 

Regards,

[Saskiaaa]

Hi Harold,

i removed and nothing change.

Regards, 

[Harold Ritter]

I edited my original post to include a few more things. 

[Saskiaaa]

Thank you mr Harold, its look better now. did you know how i can advertise the connected networks ( for example loopback )  on VMX side ?

[edit]

root@VMX1# run show bgp summary     

Threading mode: BGP I/O

Groups: 2 Peers: 3 Down peers: 1

Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending

inet.0               

                       2          1          0          0          0          0

Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...

10.100.20.2           64522         11          8       0       0        3:42 Establ

  inet.0: 1/1/1/0

10.100.21.2           64522          7          4       0       0        1:40 Establ

  inet.0: 0/1/1/0

10.100.100.2          64533          0          0       0       0     1:45:23 Active

--------

Process       RcvTblVer   bRIB/RIB   LabelVer  ImportVer  SendTblVer  StandbyVer

Speaker               7          7          7          7           7           0

Neighbor        Spk    AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down  St/PfxRcd

10.100.20.1       0 64533       6       8        7    0    0 00:02:10          0

10.100.21.1       0 64533       2       4        7    0    0 00:00:08          0

Regards,

[Harold Ritter · Accepted solution]

If you want to export the loopback interface IP address from JUNOS to XR or vice versa, you would configure something like this:

XR:

router bgp 64522

address-family ipv4 uni

network 10.100.100.3/32

JUNOS:

set protocols bgp group external-peers export loopback

set policy-options policy-statement loopback term 1 from protocol direct

set policy-options policy-statement loopback term 1 from interface lo0.0

set policy-options policy-statement loopback term 1 then accept

Regards,

[Saskiaaa]

thank you very much!