HP 6127xlg Configuration Manual page 275

127.0.0.1/32
127.255.255.255/32
200.1.1.0/24
224.0.0.0/4
224.0.0.0/24
255.255.255.255/32
# Enable BGP update packet debugging on PE 2. The output shows that PE 2 advertises the route
to 100.1.1.1/32, and the AS_PATH is 100 600.
<PE2> terminal monitor
<PE2> terminal logging level 7
<PE2> debugging bgp update vpn-instance vpn1 10.2.1.1 ipv4
<PE2> refresh bgp all export ipv4 vpn-instance vpn1
*Jun 13 16:12:52:096 2012 PE2 BGP/7/DEBUG: -MDC=1;
# Execute the display bgp routing-table ipv4 peer received-routes command on CE 2 to verify that
CE 2 has not received the route to 100.1.1.0/24.
<CE2> display bgp routing-table ipv4 peer 10.2.1.2 received-routes
Total number of routes: 2
BGP local router ID is 200.1.1.1
Status codes: * - valid, > - best, d - dampened, h - history,
Network
* >e 10.1.1.0/24
* e 10.2.1.0/24
2. Configure BGP AS number substitution on PE 2.
<PE2> system-view
[PE2] bgp 100
[PE2-bgp] ip vpn-instance vpn1
[PE2-bgp-vpn1] peer 10.2.1.1 substitute-as
[PE2-bgp-vpn1] address-family ipv4 unicast
[PE2-bgp-ipv4-vpn1] peer 10.2.1.1 enable
[PE2-bgp-ipv4-vpn1] quit
[PE2-bgp-vpn1] quit
[PE2-bgp] quit
Verifying the configuration
# The output shows that among the routes advertised by PE 2 to CE 2, the AS_PATH of 100.1.1.0/24 has
changed from 100 600 to 100 100.
*Jun 13 16:15:59:456 2012 PE2 BGP/7/DEBUG: -MDC=1;
Direct 0
Direct 0
BGP 255
Direct 0
Direct 0
Direct 0
BGP.vpn1: Send UPDATE to peer 10.2.1.1 for following destinations:
Origin : Incomplete
AS Path : 100 600
Next Hop : 10.2.1.2
100.1.1.0/24,
s - suppressed, S - stale, i - internal, e - external
Origin: i - IGP, e - EGP, ? - incomplete
NextHop
10.2.1.2
10.2.1.2
0 127.0.0.1
0 127.0.0.1
0 10.2.1.1
0 0.0.0.0
0 0.0.0.0
0 127.0.0.1
MED
0
266
InLoop0
InLoop0
Vlan12
NULL0
NULL0
InLoop0
LocPrf PrefVal Path/Ogn
0
0
100?
100?