Hi master.
I have router ASR9K with single ISP (ISP-A) using BGP routing.
now, my company need to add new ISP (ISP-B) on Router.
The ISP-B carry single ip neigbor (peering) with dual AS,
for example AS-300 for Internasional (IIX) and AS-400 for (INP).
how about config single multihoming on my Router ASR9K ?
I'm create the plan config with using wieght for traffic outbound and as-path prepend of inboud traffic.
I attach topology plan
this is my config.
Current:
1.prefix-list-Current
prefix-set NETWORK
192.168.10.0/24
192.168.20.0/24
end-set
!
prefix-set IPV4_BLOCK
10.10.0.0/16 le 32,
172.16.0.0/12 le 32,
end-set
2. Route-Policy-Current
route-policy PREFIX_OUT
if destination in NETWORK then
pass
endif
end-policy
!
route-policy RP_INBOUND
apply RPL_DENY_IPV4_BOGONS
end-policy
!
route-policy RP_DENY_IPV4_BLOCK
if destination in IPV4_BLOCK then
drop
else
pass
endif
end-policy
3. BGP Config - Current
router bgp 100
bgp router-id 1.1.1.1
address-family ipv4 unicast
network 192.168.10.0/24
network 192.168.20.0/24
!
neighbor 1.1.1.2
remote-as 200
address-family ipv4 unicast
route-policy RP_INBOUND in
route-policy PREFIX_OUT out
soft-reconfiguration inbound always
!
!
neighbor 2.2.2.1
remote-as 200
address-family ipv4 unicast
route-policy RPL_INBOUND in
route-policy PREFIX_OUT out
soft-reconfiguration inbound always
!
!
4. Route Static - Current router static
address-family ipv4 unicast
192.168.10.0/24 Null0
192.168.20.0/24 192.168.10.130
5. add attribute weight on existing BGP (ISP-A)
router bgp 100
bgp router-id 1.1.1.1
address-family ipv4 unicast
network 192.168.10.0/24
network 192.168.20.0/24
!
neighbor 1.1.1.2
remote-as 200
address-family ipv4 unicast
weight 80 (add attribute weight on BGP ISP-A)
route-policy RP_INBOUND in
route-policy PREFIX_OUT out
soft-reconfiguration inbound always
!
6. Create Route-Policy for ISP-B (new)
route-policy PREFIX_NETWORK_PREPEND_ISP-B
if destination in NETWORK then
prepend as-path 100 100
pass
else
drop
endif
end-policy
!
commit
!
7. add on BGP Config for New ISP-B
neighbor 3.3.3.2
remote-as 300
description INP-ISP-B
address-family ipv4 unicast
weight 60
route-policy RPL_INBOUND in
route-policy PREFIX_OFFICIAL_PREPEND_INDOSAT out
soft-reconfiguration inbound
!
neighbor 3.3.3.2
remote-as 400
description INIX-ISP-B
address-family ipv4 unicast
weight 60
route-policy RP_INBOUND in
route-policy PREFIX_NETWORK_PREPEND_ISP-B out
soft-reconfiguration inbound
!
commit
!
could you verify plan my config, is true or false, please give me suggestion
thanks
ubay
