Lab6 BGP Attribute

Owned by Jean-luc KRIKER
Last updated: Apr 03, 2019
8 min read










Part 2
show bgp route + hidden routes 
lab@vSRX-1> show bgp summary 
Groups: 3 Peers: 7 Down peers: 0
Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending
inet.0               
                      22         13          0          0          0          0
Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
172.18.1.1            65510         79         70       0       0       30:16 Establ
  inet.0: 9/9/9/0
192.168.2.1           64700        112        118       0       0       47:15 Establ
  inet.0: 0/9/9/0

>>>>> 0/9/9/0  ---- Active= 0 , then Rx=9 !!!!

==============================================================

lab@vSRX-1> show route protocol bgp hidden 10.4.0.0/21    

inet.0: 31 destinations, 40 routes (31 active, 0 holddown, 9 hidden)
+ = Active Route, - = Last Active, * = Both

10.4.0.0/21         [BGP/170] 00:11:48, localpref 100, from 192.168.2.1
                      AS path: 65520 I, validation-state: unverified
                      Unusable

>>>>>  9 hidden
>>>>> AS_Path : 65520  ( shortest , should had been selected )

=========================================================

lab@vSRX-1> show route protocol bgp  10.4.0.0/21          

inet.0: 31 destinations, 40 routes (31 active, 0 holddown, 9 hidden)
+ = Active Route, - = Last Active, * = Both

10.4.0.0/21        *[BGP/170] 00:12:07, localpref 100
                      AS path: 65510 65515 65520 I, validation-state: unverified
                    > to 172.18.1.1 via ge-0/0/2.0

=========================================================

vSRX-1_vr.inet.0: 26 destinations, 35 routes (17 active, 0 holddown, 18 hidden)
part 2
show Rx routes 
lab@vSRX-1> show route receive-protocol bgp 192.168.2.1 hidden table inet.0 

inet.0: 31 destinations, 40 routes (31 active, 0 holddown, 9 hidden)
  Prefix  Nexthop       MED     Lclpref    AS path
  10.4.0.0/21             172.18.2.1                   100        65520 I
  10.8.0.0/21             172.18.2.1                   100        65520 65515 26749 3356 I
  10.11.0.0/21            172.18.2.1                   100        65520 65515 65510 65510 65510 I
  10.63.4.0/22            172.18.2.1                   100        65520 65515 I
  10.68.8.0/22            172.18.2.1                   100        65520 65515 65510 I
  10.77.28.0/22           172.18.2.1                   100        65520 65515 65510 65510 26749 I
  10.87.48.0/22           172.18.2.1                   100        65520 65520 I
  10.92.12.0/22           172.18.2.1                   100        65520 65515 3356 9888 I
  10.158.56.0/22          172.18.2.1                   100        65520 65520 65520 65520 1123 I


lab@vSRX-1> show route receive-protocol bgp 192.168.2.1 hidden table inet.0 10.4.0.0/21 detail 

inet.0: 31 destinations, 40 routes (31 active, 0 holddown, 9 hidden)
  10.4.0.0/21 (2 entries, 1 announced)
     Accepted
     Nexthop: 172.18.2.1
     Localpref: 100
     AS path: 65520 I
     Communities: 65520:100 65520:1000

=====================================================================

lab@vSRX-1> show route protocol bgp  hidden table inet.0 10.4.0.0/21 detail 

inet.0: 31 destinations, 40 routes (31 active, 0 holddown, 9 hidden)
10.4.0.0/21 (2 entries, 1 announced)
         BGP    Preference: 170/-101
                Next hop type: Unusable, Next hop index: 0
                Address: 0x952dee4
                Next-hop reference count: 27
                State: <Hidden Int Ext>
                Inactive reason: Unusable path
                Local AS: 64700 Peer AS: 64700
                Age: 28:59 
                Validation State: unverified 
                Task: BGP_64700.192.168.2.1
                AS path: 65520 I
                Communities: 65520:100 65520:1000
                Accepted
                Localpref: 100
                Router ID: 192.168.2.1

>>>>> Next hop type: Unusable   >>> check the BGP_NH
=====================================================================

 lab@vSRX-1> show route 10.4.0.0/21 hidden table inet.0 

inet.0: 31 destinations, 40 routes (31 active, 0 holddown, 9 hidden)
+ = Active Route, - = Last Active, * = Both

10.4.0.0/21         [BGP/170] 00:30:37, localpref 100, from 192.168.2.1
                      AS path: 65520 I, validation-state: unverified
                      Unusable

==========================================================
No route to BGP_NH

lab@vSRX-1> show route 172.18.2.1                                                                 

lab@vSRX-1> show route 172.18.2.1 hidden 

==========================================================

Need to look into vSRX2:
--------------------------

change the NH-self

lab@vSRX-2> show configuration policy-options | display set 
set policy-options policy-statement del-comm then community delete all
set policy-options policy-statement export-isp-65510 term 1 from protocol static
set policy-options policy-statement export-isp-65510 term 1 then accept
set policy-options policy-statement export-isp-65520 term 1 from protocol static
set policy-options policy-statement export-isp-65520 term 1 then accept
set policy-options policy-statement export-static term 1 from protocol static
set policy-options policy-statement export-static term 1 then accept

set policy-options policy-statement nhs term 1 then next-hop self

set policy-options community all members .*

lab@vSRX-2> show configuration protocols bgp group my-int-group | display set         
set protocols bgp group my-int-group type internal
set protocols bgp group my-int-group local-address 192.168.2.1
set protocols bgp group my-int-group export nhs
set protocols bgp group my-int-group neighbor 192.168.1.2
set protocols bgp group my-int-group neighbor 192.168.1.1
set protocols bgp group my-int-group neighbor 192.168.2.2

==========================================================
And on vSRX1:

lab@vSRX-1> show configuration policy-options | display set 
set policy-options policy-statement export-static term 1 from protocol static
set policy-options policy-statement export-static term 1 then accept
set policy-options policy-statement nhs term 1 then next-hop self

lab@vSRX-1> show configuration protocols bbg
                                         ^
syntax error.
lab@vSRX-1> show configuration protocols bgp group my-ext-group | display set 
set protocols bgp group my-ext-group type external
set protocols bgp group my-ext-group peer-as 65510
set protocols bgp group my-ext-group neighbor 172.18.1.1
part 3
show iBGP routes 
lab@vSRX-1> show route protocol bgp aspath-regex "()" table inet.0           

inet.0: 31 destinations, 37 routes (31 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.67.192.0/21     *[BGP/170] 01:13:56, localpref 100, from 192.168.1.2
                      AS path: I, validation-state: unverified
                    > to 172.20.113.10 via lt-0/0/0.0
10.67.200.0/21     *[BGP/170] 01:14:14, localpref 100, from 192.168.2.2
                      AS path: I, validation-state: unverified
                    > to 172.20.77.2 via ge-0/0/1.0
10.69.176.0/21     *[BGP/170] 01:13:56, localpref 100, from 192.168.1.2
                      AS path: I, validation-state: unverified
                    > to 172.20.113.10 via lt-0/0/0.0
10.69.184.0/21     *[BGP/170] 01:14:14, localpref 100, from 192.168.2.2
                      AS path: I, validation-state: unverified
                    > to 172.20.77.2 via ge-0/0/1.0

lab@vSRX-1>