====Lab 2: IOS-XE BGP IPv4 Address Family====
This lab will show how to configure a basic Address Family (afi) ipv4 (safi) configuration.
{{ :cisco:bgp:ios-xe_labs:lab_2_ios-xe_bgp_ipv4_address_family.png?300|}}
Router1: 
  - Configure BGP in AS 40000.
    - RouterA(config)#**router bgp 40000**
  - Set router as 10.1.1.99.
    - RouterA(config)#**bgp router-id 10.1.1.99**
  - Change BGP timers.
    - Keepalive: 70
    - Holdtime: 120
    - RouterA(config)#**timers bgp 70 120**
  - Log BGP events to system log.
    - RouterA(config)#**bgp log-neighbor-changes**
  - Configure Router2 as an eBGP neighbor in AS 45000, using directly connected ports.
    - RouterA(config)#**neighbor 192.168.1.1 remote-as 45000**
  - Configure address-family ipv4 under the router bgp configuration.
    - RouterA(config)#**address-family ipv4**
  - Set address family network to 10.1.1.0/24
    - RouterA(config)#**network 10.1.1.0 mask 255.255.255.0**
  - Activate network 10.1.1.0
    - RouterA(config)#**neighbor 192.168.1.1 activate**

Router2: 
  - Configure BGP in AS 45000.
    - RouterB(config)#**router bgp 45000**
  - Set router as 172.17.1.99.
    - RouterB(config)#**bgp router-id 172.17.1.99**
  - Change BGP timers.
    - Keepalive: 70
    - Holdtime: 120
    - RouterB(config)#**timers bgp 70 120**
  - Log BGP events to system log.
    - RouterB(config)#**bgp log-neighbor-changes**
  - Configure Router1 as an eBGP neighbor in AS 40000, using directly connected ports.
    - RouterB(config)#**neighbor 192.168.1.2 remote-as 40000**
  - Configure address-family ipv4 under the router bgp configuration.
    - RouterB(config)#**address-family ipv4**
  - Set address family network to 172.17.1.0/24
    - RouterB(config)#**network 172.17.1.0 mask 255.255.255.0**
  - Activate network 172.17.1.0
    - RouterB(config)#**neighbor 192.168.1.2 activate**

<code>
RouterA#show ip bgp
BGP table version is 3, local router ID is 10.1.1.99
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
              x best-external, a additional-path, c RIB-compressed, 
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  10.1.1.0/24      0.0.0.0                  0         32768 i
 *>  172.17.1.0/24    192.168.1.1              0             0 45000 i
</code>
<code>
RouterB#show ip bgp
BGP table version is 3, local router ID is 172.17.1.99
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, 
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, 
              x best-external, a additional-path, c RIB-compressed, 
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  10.1.1.0/24      192.168.1.2              0             0 40000 i
 *>  172.17.1.0/24    0.0.0.0                  0         32768 i
</code>

Another verification command is: **show ip bgp neighbors**

[[http://www.dergenterprises.com/wiki/doku.php?id=cisco:bgp:ios-xe_labs:lab2:lab2_answer|Lab 2: Answer]]\\ 
[[http://www.dergenterprises.com/wiki/doku.php?id=cisco:bgp:ios-xe_labs|IOS-XE Labs]]\\