HP VPN Firewall Appliances Network Management Configuration Guide

528
AS-path : 100
Origin : igp
Attribute value : MED 0, localpref 100, pref-val 0, pre 255
State : valid, internal, best,
Not advertised to any peers yet
The output indicates the following:
{ Router E can send route information to Router B and Router C through the confederation by
establishing only an EBGP connection with Router A.
{ Router B and Router D are in the same confederation, but belong to different sub-ASs. They
obtain external route information from Router A and generate the same BGP route entries; it
seems like that they reside in the same AS although they have no direct connection in between.
BGP path selection configuration example
Network requirements
• In Figure 304, all routers run BGP. EBGP runs between Router A and Router B, and between Router
A and Router C. IBGP runs between Firewall and Router B, and between Firewall and Router C.
• OSPF is the IGP protocol in AS 200.
• Configure routing policies to make Firewall give priority to the route 1.0.0.0/8 learned from Router
C.
Figure 304 Network diagram
Device Interface IP address Device Interface IP address
Router A GE0/3 1.0.0.0/8 Firewall GE0/1 195.1.1.1/24
GE0/1 192.1.1.1/24 GE0/2 194.1.1.1/24
GE0/2 193.1.1.1/24 Router C GE0/1 195.1.1.2/24
Router B GE0/1 192.1.1.2/24 GE0/2 193.1.1.2/24
GE0/2 194.1.1.2/24
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure OSPF on Router B, Router C, and Firewall:
# Configure Router B.
<RouterB> system-view
[RouterB] ospf