Huawei Quidway NetEngine80E Configuration Manual page 974

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Figure 8-24 Peer type application networking
Router A
The EBGP route is selected as the optimal route, which prevents the traffic that leaves Router
A or Router B for the Internet from being forwarded to the other egress device.
For more peer type-based route selection examples, see Local_Pref.
IGP Cost
BGP prefers the route with the smallest IGP cost during BGP route selection.
This rule helps BGP to choose the route with the smallest cost to its iterated next hop address
quickly. If the bestroute igp-metric-ignore command is configured, BGP does not compare
the IGP cost. In
between Router E and Router A and between Router E and Router B, and an IBGP peer
relationship is established between Router A and Router C, between Router A and Router D,
between Router B and Router C, and between Router B and Router D; Router E is configured
to import routes (1.1.1.9/32 for example) from AS 100 to BGP.
Issue 02 (2014-09-30)
Internet
EBGP
IBGP
Figure 8-25, OSPF runs in AS 65001, an EBGP peer relationship is established
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8 BGP Configuration
EBGP
Router B
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