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hints:routing [2020/09/22 21:08] – [Conclusion] philiphints:routing [2020/09/22 21:12] (current) – [Complete Configuration] philip
Line 78: Line 78:
 route-map EBGP-in permit 5 route-map EBGP-in permit 5
  description Do not propagate default route  description Do not propagate default route
- match ip address prefix-list default+ match ip address prefix-list DEFAULT
  set community no-advertise  set community no-advertise
 ! !
Line 88: Line 88:
  address-family ipv4  address-family ipv4
   neighbor 10.10.10.1 route-map EBGP-in in   neighbor 10.10.10.1 route-map EBGP-in in
 +  distance bgp 20 200 200
 ! !
 </code> </code>
Line 99: Line 100:
 ==== Complete Configuration ==== ==== Complete Configuration ====
  
-For BR1:+For BR1 (making BR1 the //main// default gateway): 
 <code> <code>
 +router isis ISP
 + ...
 + default-information originate route-map DEFAULT-ORIG
 +!
 +router bgp 64512
 + address-family ipv4
 +  neighbor 10.10.10.1 route-map EBGP-in in
 +  distance bgp 20 200 200
 +!
 +ip access-list standard BGP-NH
 + remark External BGP speaker
 + permit 10.10.10.1
 +!
 +ip prefix-list DEFAULT permit 0.0.0.0/0
 +!
 +route-map DEFAULT-ORIG permit 5
 + match ip address prefix-list DEFAULT
 + match ip next-hop BGP-NH
 +!
 +route-map EBGP-in permit 5
 + description Do not propagate default route
 + match ip address prefix-list DEFAULT
 + set community no-advertise
 +!
 +route-map EBGP-in permit 10
 + description Other policy
 + ...
 +!
 +</code>
 +
 +For BR2 (making BR2 the //backup// default gateway):
 +
 +<code>
 +router isis ISP
 + ...
 + default-information originate route-map DEFAULT-ORIG
 +!
 +router bgp 64512
 + address-family ipv4
 +  neighbor 10.10.20.1 route-map EBGP-in in
 +  distance bgp 20 200 200
 +!
 +ip access-list standard BGP-NH
 + remark External BGP speaker
 + permit 10.10.20.1
 +!
 +ip prefix-list DEFAULT permit 0.0.0.0/0
 +!
 +route-map DEFAULT-ORIG permit 5
 + match ip address prefix-list DEFAULT
 + match ip next-hop BGP-NH
 + set metric 10
 +!
 +route-map EBGP-in permit 5
 + description Do not propagate default route
 + match ip address prefix-list DEFAULT
 + set community no-advertise
 +!
 +route-map EBGP-in permit 10
 + description Other policy
 + ...
 +!
 +</code>
  
  
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hints/routing.1600772913.txt.gz · Last modified: 2020/09/22 21:08 by philip