This article will show you how to create BGP sessions on Ufispace devices, as well as some examples of filters, prefix lists and community application.

To work out the configurations, the following scenario will be used:

BGP Ufispace: 10.0.0.1 
Neighbor BGP: 10.0.0.2 
AS Local: 65000 
AS Remoto: 65010 
Prefixo BGP local: 200.0.0.0/22 
Prefixo BGP remoto: 210.0.0.0/22 

BGP Policy: Default route announcement + local prefix
; Accept only the 210.0.0.0/22 prefix with community tag 65000:1000
; Both using a route map

Default route prefix list configuration:

ip prefix-list DEFAULT-ROUTE 
permit 0.0.0.0/0 

Prefix-List configuration with prefixes 200.0.0.0/22 and 210.0.0.0/22, allowing up to /24:

ip prefix-list LAB_NETWORK 
permit 200.0.0.0/22 le 24 
 
ip prefix-list CUSTOMER-AS-65010 
permit 210.0.0.0/22 le 24 

Route-Map configuration allowing ASN prefix 65010 and marking community 65000:1000 :

route-map CUSTOMER-AS-65010-IN permit 10 
match ip address prefix-list CUSTOMER-AS-65010 
set community 65000:1000 
 
route-map CUSTOMER-AS-65010-IN deny 5000 

Route-Map configuration to announce default route and 200.0.0.0/22 prefix:

route-map CUSTOMER-AS-65010-OUT permit 10 
match ip address prefix-list DEFAULT-ROUTE 
 
route-map CUSTOMER-AS-65010-OUT permit 20 
match ip address prefix-list LAB_NETWORK 
 
route-map CUSTOMER-AS-65010-OUT deny 5000 

Configuration of blackhole routes (to avoid static loops and create routes in the routing table):

ip route 200.0.0.0/22 null 
ip route 200.0.0.0/23 null 
ip route 200.0.2.0/23 null 

Access BGP configuration by entering the Local AS:

router bgp 65000 

Configure Router-ID

bgp router-id 10.99.99.1 

IPv4 network configuration:

address-family ipv4 
network 200.0.0.0/22 
network 200.0.0.0/23 
network 200.0.2.0/23 
exit 

BGP neighbor configuration:

neighbor 10.0.0.2 remote-as 65010 
neighbor 10.0.0.2 description CUSTOMER-AS-65010 

Configuring BGP filters:

address-family ipv4 
neighbor 10.0.0.2 activate 
neighbor 10.0.0.2 route-map CUSTOMER-AS-65010-OUT out 
neighbor 10.0.0.2 route-map CUSTOMER-AS-65010-IN in 
exit 

Check configuration and apply:

exit 
show transaction current 
commit 
exit 

To check the status of the BGP session:

OcNOS#show ip bgp summary 
BGP router identifier 10.99.99.1, local AS number 65000 
BGP table version is 2 
2 BGP AS-PATH entries 
1 BGP community entries 
 
Neighbor                 V   AS   MsgRcv    MsgSen TblVer   InQ   OutQ    Up/Down   State/PfxRcd 
10.0.0.2                 4 65010  611        619       2      0      0  00:06:21               3 

Check what is being announced in the BGP session:

OcNOS#show ip bgp neighbors 10.0.0.2 advertised-routes 
 
Address family: IPv4 Unicast 
BGP table version is 2, local router ID is 10.99.99.1 
Status codes: s suppressed, d damped, a add-path, h history, * valid, > best, i - internal 
Origin codes: i - IGP, e - EGP, ? - incomplete 
 
    Network          Next Hop            Metric    LocPrf   Weight Path 
*>   200.0.0.0/22     10.0.0.1             0        100       32768  i 
*>   200.0.0.0/23     10.0.0.1             0        100       32768  i 
*>   200.0.2.0/23     10.0.0.1             0        100       32768  i 

Check what we have received as a prefix:

OcNOS#show ip bgp neighbors 10.0.0.2 routes 
BGP table version is 2, local router ID is 10.99.99.1 
Status codes: s suppressed, d damped, h history, a add-path, * valid, > best, i - internal, 
              l - labeled, S Stale 
Origin codes: i - IGP, e - EGP, ? - incomplete 
 
    Network          Next Hop            Metric    LocPrf   Weight Path 
*>   210.0.0.0/22     10.0.0.2             0        100       0   65010 i 
*>   210.0.0.0/23     10.0.0.2             0        100       0   65010 i 
*>   210.0.2.0/23     10.0.0.2             0        100       0   65010 i 

Summary of all settings applied

! 
ip prefix-list CUSTOMER-AS-65010 
 seq 5 permit 210.0.0.0/22 le 24 
! 
ip prefix-list DEFAULT-ROUTE 
 seq 5 permit 0.0.0.0/0 
! 
ip prefix-list LAB_NETWORK 
 seq 5 permit 200.0.0.0/22 le 24 
! 
route-map CUSTOMER-AS-65010-IN permit 10 
 match ip address prefix-list CUSTOMER-AS-65010 
 set community 65000:1000 
! 
route-map CUSTOMER-AS-65010-IN deny 5000 
! 
route-map CUSTOMER-AS-65010-OUT permit 10 
 match ip address prefix-list DEFAULT-ROUTE 
! 
route-map CUSTOMER-AS-65010-OUT permit 20 
 match ip address prefix-list LAB_NETWORK 
! 
route-map CUSTOMER-AS-65010-OUT deny 5000 
! 
router bgp 65000 
 bgp router-id 10.99.99.1 
 neighbor 10.0.0.2 remote-as 65010 
 neighbor 10.0.0.2 description CUSTOMER-AS-65010 
 ! 
 address-family ipv4 unicast 
 network 200.0.0.0/22 
 network 200.0.0.0/23 
 network 200.0.2.0/23 
 neighbor 10.0.0.2 activate 
 neighbor 10.0.0.2 route-map CUSTOMER-AS-65010-IN in 
 neighbor 10.0.0.2 route-map CUSTOMER-AS-65010-OUT out 
 exit-address-family 
!