BGP Design Change ISP1 and ISP2
Configuring BGP in all the ISPs (ISP1, ISP2 and ISP3)
Inside ISP1:
1. Template
peer-policy and template peer-session must be used on both RR1 and RR2
2. There's an
IBGP session between both RRs inside each ISP running different cluster-IDs
between them
3. BGP free
core must be used inside ISP1 and ISP2 (by enabling MPLS LDP inside them). RR1
and RR2 in ISP1 shouldn't be configuredwith MPLS LDP as they are out of
Forwarding Path
4. No BGP
should be enabled on P1 and P2 inside ISP1 and ISP2 as well
5. No BGP
should be enabled at this question for ASBRs on both ISP1 and ISP2 towards RRs
6. Raising
ISIS level2 with area 40 inside ISP3 with mpls ldp auto-config
7. BGP should
be configured between ASBR1-ISP1 and ASBR1-ISP3, ASBR1-ISP1 and ASBR2-ISP3,
ASBR1-ISP3 and ASBR2-ISP3, ASBR1-ISP2 and ASBR1-ISP3, ASBR1-ISP2 and ASBR2-ISP3
ISP-1, ISP-2 and ISP-3 each requires change in BGP design
architecture.
Your tasks are to implement these changes:
a)
For ISP-1 simplify the
administration process. To achieve this goal, you must re-configure the BGP RR1
and RR2 by using the template peer–policy and template peer-session commands .These
commands must be applied in all iBGP peers and in all BGP address templates
that are in use currently. For this question the BGP address families a
I.
IPv4 unicast
II.
VPNv4 unicast
III.
IPv6 unicast and
IV.
VPNv6 unicast
b)
For ISP-1 and ISP-2 optimize
the processing power of the core routers in order to save routing space. To
achieve this goal you must configure the ISP-1 and ISP-2 to the BGP free core.
c)
Configure External BGP among
ISP-1 and ISP-2 and ISP-3 for ipv4 and ipv6 address families
I.
ISP1 ASBR1<--->ISP2 ASBR1
II.
ISP1 ASBR1<--->ISP3 ASBR1
III.
ISP1 ASBR1<--->ISP3 ASBR2
IV.
ISP2 ASBR1<--->ISP3 ASBR1
V.
ISP2 ASBR1<--->ISP3 ASBR2
VI.
ISP1 ASBR2<--->ISP2 ASBR2
Solution:
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NOTES:
Tips: ·
IPv4 and IPv6 have consistent BGP session on the
topology ·
Advertise all loopback0 on the ASBR1 and ASBR2 in
the ISP1, and the same on the ASBR1 and ASBR2 in the ISP2 ·
Add two loopback interface on PE1 in the ISP1: o
loopback12=12.0.0.131/32 o
loopback129=129.12.0.131/32
and the same on the PE1 in the ISP2: o
loopback22=22.0.0.131/32 o
loopback129=129.22.0.131/32 ·
Advertise the new loopback on the PE1,and carrier
the community information: o
ISP1: Class-A address community=1:200 Class-B
address community=1:300 o
ISP2: Class-A address community=2:200 Class-B
address community=2:300 ·
IPv4 BGP Path select Class-A address access each other between the ISP1
and ISP2 use the path as: o
First: ISP1 ASBR2<--->ISP2 ASBR2 o
Third: ISP1 ASBR1<--->ISP3<--->ISP2
ASBR1 Class-B address access each other between the ISP1
and ISP2 use the path as: o
First: ISP1 ASBR1<--->ISP3 ASBR2<--->
ISP2 ASBR1 o
Secondary: ISP1 ASBR1<--->ISP2 ASBR1 o
Third: ISP1 ASBR2<--->ISP2 ASBR2
Notes: ISP1-RR1 will be
configured with cluster: 1.0.0.111, ISP1-RR2 will be configured with cluster:
1.0.0.112 ISP2-RR1 will be
configured with cluster: 2.0.0.111, ISP2-RR2 will be configured with cluster:
2.0.0.112
In ISP1 the following
BGP families will be established: IPv4-LU, IPv6, VPNv4,
VPNv6
In ISP2 the following
BGP families will be established: IPv4, IPv6, VPNv4,
VPNv6
In ISP3 the following
BGP families will be established: IPv4-LU, IPv6 Also in ISP3 mpls
ldp autoconfigwill be configured for enabling LDP as a transport label protocol
inside ISP3
There's a IBGP
session (IPv4, IPv6, VPNv4, VPNv6) between both RRs inside each ISP running
different cluster-IDs between them.
BGP free core must be
used inside ISP1 and ISP2 (by enabling MPLS LDP inside them). RR1 and RR2 in
ISP1 shouldn't be configuredwith MPLS LDP as they are out of Forwarding Path
No BGP should be
enabled on P1 and P2 inside ISP1 and ISP2 as well - as a part of BGP free-core
BGP IPv4 LU and IPv6
should be configured between ASBR1-ISP1 and ASBR1-ISP3, ASBR1-ISP1 and
ASBR2-ISP3, ASBR1-ISP3 and ASBR2-ISP3, ASBR1-ISP2 and ASBR1-ISP3, ASBR1-ISP2
and ASBR2-ISP3.
Also static routes to
NH /32 will be configured for preparing transport of Inter-AS for resolving
and having labeled path end-to-end between ISP1 and ISP2
On IOS-XR IBGP
community is sent by default --- we should explicitly send community on EBGP. on IOS-XR we need to
do it for both IBGP and EBGP peering
On ISP1 we will
configure MPLS LDP for every physical interface On ISP2 we will not
configured here anything but in next question we will remove all the mpls ip
configurations from the interface mode and will configure mpls
ldp autoconfigon IGP
On IOS-XR together
with applying address-family ipv4 labeled-unicast we also need globally under
the BGP configuration mode configureunder the address-family ipv4 unicast the
allocate-label all, otherwise the BGP-LU will not work as expected on IOS-XR
platform
Regarding BGP cluster-ID: The bgp cluster-id
command is used to assign a cluster ID to a route reflector when the cluster
has one or more route reflectors.
Multiple route
reflectors are deployed in a cluster to increase redundancy and avoid a
single point of failure.
When multiple route
reflectors are configured in a cluster, the same cluster ID is assigned to
all route reflectors.
This allows all route
reflectors in the cluster to recognize updates from peers in the same cluster
and reduces the number of updates that need to be stored in BGP routing
tables.
If you DO put the
same cluster ID on all RR's, then it will be used as a loop prevention
mechanism. While this may sound
good, it means that if a downstream router loses connection to one RR,the
route will NOT pass to the second RR back to the first RR at all. Current best practice is different cluster ids
on each RR.
If you have multiple
route reflectors that service the same group of clients (i.e. redundant RRs
in a cluster)the RRs should all share the same cluster-id.
The default
cluster-id is your router-id. So by
default they'll be different.
//Need
to verify if EBGP on ISP3---ISP1---ISP2 need to be raised on both physical links
or only on one of them!!! //Also
we need to check regarding different BGP commands that need to be applied
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RP/0/0/CPU0:ISP1-ASBR1# router bgp 1 bgp router-id 1.0.0.121 address-family ipv4 unicast network 1.0.0.101/32 network 1.0.0.102/32 network 1.0.0.111/32 network 1.0.0.112/32 network 1.0.0.121/32 network 1.0.0.122/32 network 1.0.0.131/32 network 1.0.0.132/32 network 1.0.0.133/32 allocate-label all ! address-family ipv6 unicast network 2001:db8::1:101/128 network 2001:db8::1:102/128 network 2001:db8::1:111/128 network 2001:db8::1:112/128 network 2001:db8::1:121/128 network 2001:db8::1:122/128 network 2001:db8::1:131/128 network 2001:db8::1:132/128 network 2001:db8::1:133/128 ! neighbor 1.0.0.111 remote-as 1 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 1.0.0.112 remote-as 1 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 2001:db8::1:111 remote-as 1 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! neighbor 2001:db8::1:112 remote-as 1 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! ! RP/0/0/CPU0:ISP1-ASBR2# router bgp 1 bgp router-id 1.0.0.122 address-family ipv4 unicast network 1.0.0.101/32 network 1.0.0.102/32 network 1.0.0.111/32 network 1.0.0.112/32 network 1.0.0.121/32 network 1.0.0.122/32 network 1.0.0.131/32 network 1.0.0.132/32 network 1.0.0.133/32 allocate-label all ! address-family ipv6 unicast network 2001:db8::1:101/128 network 2001:db8::1:102/128 network 2001:db8::1:111/128 network 2001:db8::1:112/128 network 2001:db8::1:121/128 network 2001:db8::1:122/128 network 2001:db8::1:131/128 network 2001:db8::1:132/128 network 2001:db8::1:133/128 ! neighbor 1.0.0.111 remote-as 1 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 1.0.0.112 remote-as 1 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 2001:db8::1:111 remote-as 1 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! neighbor 2001:db8::1:112 remote-as 1 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! ! RP/0/0/CPU0:ISP1-PE1# route-policy COMM200 set community (1:200) end-policy ! route-policy COMM300 set community (1:300) end-policy ! router bgp 1 bgp router-id 1.0.0.131 address-family ipv4 unicast network 12.0.0.0/8 route-policy COMM200 network 129.12.0.0/16 route-policy COMM300 allocate-label all ! address-family ipv6 unicast ! neighbor 1.0.0.111 remote-as 1 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 1.0.0.112 remote-as 1 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 2001:db8::1:111 remote-as 1 update-source Loopback0 address-family ipv6 unicast ! ! neighbor 2001:db8::1:112 remote-as 1 update-source Loopback0 address-family ipv6 unicast ! ! ! RP/0/0/CPU0:ISP1-PE2# router bgp 1 bgp router-id 1.0.0.132 address-family ipv4 unicast ! address-family ipv6 unicast ! neighbor 1.0.0.111 remote-as 1 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 1.0.0.112 remote-as 1 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 2001:db8::1:111 remote-as 1 update-source Loopback0 address-family ipv6 unicast ! ! neighbor 2001:db8::1:112 remote-as 1 update-source Loopback0 address-family ipv6 unicast ! ! ! RP/0/0/CPU0:ISP1-PE3# router bgp 1 bgp router-id 1.0.0.133 address-family ipv4 unicast ! address-family ipv6 unicast ! neighbor 1.0.0.111 remote-as 1 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 1.0.0.112 remote-as 1 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 2001:db8::1:111 remote-as 1 update-source Loopback0 address-family ipv6 unicast ! ! neighbor 2001:db8::1:112 remote-as 1 update-source Loopback0 address-family ipv6 unicast ! ! ! ISP1-RR1# template peer-policy IBGP route-reflector-client send-community both exit-peer-policy ! template peer-session IBGP remote-as 1 update-source Loopback0 exit-peer-session ! bgp router-id 1.0.0.111 bgp log-neighbor-changes no bgp default ipv4-unicast
neighbor
1.0.0.121 inherit peer-session IBGP neighbor 1.0.0.122 inherit peer-session IBGP neighbor 1.0.0.131 inherit peer-session IBGP neighbor 1.0.0.132 inherit peer-session IBGP neighbor 1.0.0.133 inherit peer-session IBGP
neighbor
2001:DB8::1:121 inherit peer-session IBGP neighbor 2001:DB8::1:122 inherit
peer-session IBGP neighbor 2001:DB8::1:131 inherit
peer-session IBGP neighbor 2001:DB8::1:132 inherit
peer-session IBGP neighbor 2001:DB8::1:133 inherit
peer-session IBGP ! address-family ipv4
neighbor
1.0.0.121 inherit peer-policy IBGP neighbor 1.0.0.121 send-label neighbor 1.0.0.122 activate neighbor 1.0.0.122 inherit peer-policy IBGP neighbor 1.0.0.122 send-label neighbor 1.0.0.131 activate neighbor 1.0.0.131 inherit peer-policy IBGP neighbor 1.0.0.131 send-label neighbor 1.0.0.132 activate neighbor 1.0.0.132 inherit peer-policy IBGP neighbor 1.0.0.133 activate neighbor 1.0.0.133 inherit peer-policy IBGP exit-address-family ! address-family ipv6
neighbor 2001:DB8::1:121 activate neighbor 2001:DB8::1:121
inherit peer-policy IBGP neighbor 2001:DB8::1:122 activate neighbor 2001:DB8::1:122 inherit peer-policy
IBGP neighbor 2001:DB8::1:131 activate neighbor 2001:DB8::1:131 inherit
peer-policy IBGP neighbor 2001:DB8::1:132 activate neighbor 2001:DB8::1:132 inherit
peer-policy IBGP neighbor 2001:DB8::1:133 activate neighbor 2001:DB8::1:133 inherit peer-policy
IBGP exit-address-family ! ISP1-RR2# router bgp 1 template peer-policy IBGP route-reflector-client send-community both exit-peer-policy ! template peer-session IBGP remote-as 1 update-source Loopback0 exit-peer-session ! bgp router-id 1.0.0.112 bgp log-neighbor-changes no bgp default ipv4-unicast
neighbor 1.0.0.121 inherit peer-session IBGP neighbor 1.0.0.122 inherit peer-session IBGP neighbor 1.0.0.131 inherit peer-session IBGP neighbor 1.0.0.132 inherit peer-session IBGP neighbor 1.0.0.133 inherit peer-session IBGP neighbor 2001:DB8::1:121 inherit
peer-session IBGP neighbor 2001:DB8::1:122 inherit
peer-session IBGP neighbor 2001:DB8::1:131 inherit
peer-session IBGP neighbor 2001:DB8::1:132 inherit
peer-session IBGP neighbor 2001:DB8::1:133 inherit
peer-session IBGP ! address-family ipv4
neighbor 1.0.0.121 activate neighbor 1.0.0.121 inherit peer-policy IBGP neighbor 1.0.0.121 send-label neighbor 1.0.0.122 activate neighbor 1.0.0.122 inherit peer-policy IBGP neighbor 1.0.0.122 send-label neighbor 1.0.0.131 activate neighbor 1.0.0.131 inherit peer-policy IBGP neighbor 1.0.0.131 send-label neighbor 1.0.0.132 activate neighbor 1.0.0.132 inherit peer-policy IBGP neighbor 1.0.0.133 activate neighbor 1.0.0.133 inherit peer-policy IBGP exit-address-family ! address-family ipv6
neighbor 2001:DB8::1:121 activate neighbor 2001:DB8::1:121
inherit peer-policy IBGP neighbor 2001:DB8::1:122 activate neighbor 2001:DB8::1:122 inherit
peer-policy IBGP neighbor 2001:DB8::1:131 activate neighbor 2001:DB8::1:131 inherit
peer-policy IBGP neighbor 2001:DB8::1:132 activate neighbor 2001:DB8::1:132 inherit
peer-policy IBGP neighbor 2001:DB8::1:133 activate neighbor 2001:DB8::1:133 inherit
peer-policy IBGP exit-address-family ! |
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show
bgp ipv4 unicast summary show
bgp ipv6 unicast summary show
bgp vpnv4 unicast summary show
bgp vpnv6 unicast summary |
ISP2
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RP/0/0/CPU0:ISP2-PE1# route-policy COMM200 set community (2:200) end-policy ! route-policy COMM300 set community (2:300) end-policy ! route-policy add-path set path-selection backup 1 advertise
install end-policy ! router bgp 2 bgp router-id 2.0.0.131 address-family ipv4 unicast
network 22.0.0.0/8 route-policy COMM200 network
129.22.0.0/16 route-policy COMM300 ! address-family ipv6 unicast additional-paths receive additional-paths send advertise best-external additional-paths selection route-policy
add-path ! neighbor 2.0.0.111 remote-as 2 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 2.0.0.112 remote-as 2 update-source Loopback0 address-family ipv4 unicast ! ! neighbor 2001:db8::2:111 remote-as 2 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! neighbor 2001:db8::2:112 remote-as 2 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! ! ISP2-PE2# ! route-map COMM300 permit 10 set community 2:300 ! router bgp 2 bgp router-id 2.0.0.132 bgp log-neighbor-changes no bgp default ipv4-unicast neighbor 2.0.0.111 remote-as 2 neighbor 2.0.0.111 update-source Loopback0 neighbor 2.0.0.112 remote-as 2 neighbor 2.0.0.112 update-source Loopback0 neighbor 2001:DB8::2:111 remote-as 2 neighbor 2001:DB8::2:111 update-source
Loopback0 neighbor 2001:DB8::2:112 remote-as 2 neighbor 2001:DB8::2:112 update-source
Loopback0 ! address-family ipv4 network 2.0.100.132 mask 255.255.255.255
route-map COMM300 neighbor 2.0.0.111 activate neighbor 2.0.0.111 send-community neighbor 2.0.0.111 next-hop-self neighbor 2.0.0.112 activate neighbor 2.0.0.112 send-community neighbor 2.0.0.112 next-hop-self exit-address-family ! address-family ipv6 bgp additional-paths install no bgp recursion host neighbor 2001:DB8::2:111 activate neighbor 2001:DB8::2:111 next-hop-self neighbor 2001:DB8::2:112 activate neighbor 2001:DB8::2:112 next-hop-self exit-address-family ! ISP2-ASBR1# router bgp 2 bgp router-id 2.0.0.121 bgp log-neighbor-changes no bgp default ipv4-unicast neighbor 2.0.0.111 remote-as 2 neighbor 2.0.0.111 update-source Loopback0 neighbor 2.0.0.112 remote-as 2 neighbor 2.0.0.112 update-source Loopback0 neighbor 2001:DB8::2:111 remote-as 2 neighbor 2001:DB8::2:111 update-source
Loopback0 neighbor 2001:DB8::2:112 remote-as 2 neighbor 2001:DB8::2:112 update-source
Loopback0 ! address-family ipv4 bgp additional-paths install network 2.0.0.101 mask 255.255.255.255 network 2.0.0.102 mask 255.255.255.255 network 2.0.0.111 mask 255.255.255.255 network 2.0.0.112 mask 255.255.255.255 network 2.0.0.121 mask 255.255.255.255 network 2.0.0.122 mask 255.255.255.255 network 2.0.0.131 mask 255.255.255.255 network 2.0.0.132 mask 255.255.255.255 neighbor 2.0.0.111 activate neighbor 2.0.0.111 send-community neighbor 2.0.0.111 next-hop-self neighbor 2.0.0.112 activate neighbor 2.0.0.112 send-community neighbor 2.0.0.112 next-hop-self exit-address-family ! address-family ipv6 bgp additional-paths install no bgp recursion host network 2001:DB8::2:101/128 network 2001:DB8::2:102/128 network 2001:DB8::2:111/128 network 2001:DB8::2:112/128 network 2001:DB8::2:121/128 network 2001:DB8::2:122/128 network 2001:DB8::2:131/128 network 2001:DB8::2:132/128 neighbor 2001:DB8::2:111 activate neighbor 2001:DB8::2:111 next-hop-self neighbor 2001:DB8::2:112 activate neighbor 2001:DB8::2:112 next-hop-self exit-address-family ! ISP2-ASBR2# bgp router-id 2.0.0.122 bgp log-neighbor-changes no bgp default ipv4-unicast neighbor 2.0.0.111 remote-as 2 neighbor 2.0.0.111 update-source Loopback0 neighbor 2.0.0.112 remote-as 2 neighbor 2.0.0.112 update-source Loopback0 neighbor 2001:DB8::2:111 remote-as 2 neighbor 2001:DB8::2:111 update-source
Loopback0 neighbor 2001:DB8::2:112 remote-as 2 neighbor 2001:DB8::2:112 update-source
Loopback0 ! address-family ipv4 network 2.0.0.101 mask 255.255.255.255 network 2.0.0.102 mask 255.255.255.255 network 2.0.0.111 mask 255.255.255.255 network 2.0.0.112 mask 255.255.255.255 network 2.0.0.121 mask 255.255.255.255 network 2.0.0.122 mask 255.255.255.255 network 2.0.0.131 mask 255.255.255.255 network 2.0.0.132 mask 255.255.255.255 neighbor 2.0.0.111 activate neighbor 2.0.0.111 send-community neighbor 2.0.0.111 next-hop-self neighbor 2.0.0.112 activate neighbor 2.0.0.112 send-community neighbor 2.0.0.112 next-hop-self exit-address-family ! address-family ipv6 bgp additional-paths install no bgp recursion host network 2001:DB8::2:101/128 network 2001:DB8::2:102/128 network 2001:DB8::2:111/128 network 2001:DB8::2:112/128 network 2001:DB8::2:121/128 network 2001:DB8::2:122/128 network 2001:DB8::2:131/128 network 2001:DB8::2:132/128 neighbor 2001:DB8::2:111 activate neighbor 2001:DB8::2:111 next-hop-self neighbor 2001:DB8::2:112 activate neighbor 2001:DB8::2:112 next-hop-self exit-address-family ! ISP2-RR1# router bgp 2 bgp router-id 2.0.0.111 bgp log-neighbor-changes no bgp default ipv4-unicast neighbor 2.0.0.121 remote-as 2 neighbor 2.0.0.121 update-source Loopback0 neighbor 2.0.0.122 remote-as 2 neighbor 2.0.0.122 update-source Loopback0 neighbor 2.0.0.131 remote-as 2 neighbor 2.0.0.131 update-source Loopback0 neighbor 2.0.0.132 remote-as 2 neighbor 2.0.0.132 update-source Loopback0 neighbor 2001:DB8::2:121 remote-as 2 neighbor 2001:DB8::2:121 update-source
Loopback0 neighbor 2001:DB8::2:122 remote-as 2 neighbor 2001:DB8::2:122 update-source
Loopback0 neighbor 2001:DB8::2:131 remote-as 2 neighbor 2001:DB8::2:131 update-source
Loopback0 neighbor 2001:DB8::2:132 remote-as 2 neighbor 2001:DB8::2:132 update-source
Loopback0 ! address-family ipv4 neighbor 2.0.0.121 activate neighbor 2.0.0.121 send-community both neighbor 2.0.0.121 route-reflector-client neighbor 2.0.0.122 activate neighbor 2.0.0.122 send-community both neighbor 2.0.0.122 route-reflector-client neighbor 2.0.0.131 activate neighbor 2.0.0.131 send-community both neighbor 2.0.0.131 route-reflector-client neighbor 2.0.0.132 activate neighbor 2.0.0.132 send-community both neighbor 2.0.0.132 route-reflector-client exit-address-family ! address-family ipv6 bgp additional-paths install no bgp recursion host neighbor 2001:DB8::2:121 activate neighbor 2001:DB8::2:121
route-reflector-client neighbor 2001:DB8::2:122 activate neighbor 2001:DB8::2:122
route-reflector-client neighbor 2001:DB8::2:131 activate neighbor 2001:DB8::2:131
route-reflector-client neighbor 2001:DB8::2:132 activate neighbor 2001:DB8::2:132
route-reflector-client exit-address-family ! ISP2-RR2# router bgp 2 bgp router-id 2.0.0.112 bgp log-neighbor-changes no bgp default ipv4-unicast neighbor 2.0.0.121 remote-as 2 neighbor 2.0.0.121 update-source Loopback0 neighbor 2.0.0.122 remote-as 2 neighbor 2.0.0.122 update-source Loopback0 neighbor 2.0.0.131 remote-as 2 neighbor 2.0.0.131 update-source Loopback0 neighbor 2.0.0.132 remote-as 2 neighbor 2.0.0.132 update-source Loopback0 neighbor 2001:DB8::2:121 remote-as 2 neighbor 2001:DB8::2:121 update-source
Loopback0 neighbor 2001:DB8::2:122 remote-as 2 neighbor 2001:DB8::2:122 update-source
Loopback0 neighbor 2001:DB8::2:131 remote-as 2 neighbor 2001:DB8::2:131 update-source
Loopback0 neighbor 2001:DB8::2:132 remote-as 2 neighbor 2001:DB8::2:132 update-source
Loopback0 ! address-family ipv4 neighbor 2.0.0.121 activate neighbor 2.0.0.121 send-community neighbor 2.0.0.121 route-reflector-client neighbor 2.0.0.122 activate neighbor 2.0.0.122 send-community neighbor 2.0.0.122 route-reflector-client neighbor 2.0.0.131 activate neighbor 2.0.0.131 send-community neighbor 2.0.0.131 route-reflector-client neighbor 2.0.0.132 activate neighbor 2.0.0.132 send-community neighbor 2.0.0.132 route-reflector-client exit-address-family ! address-family ipv6 bgp additional-paths install no bgp recursion host neighbor 2001:DB8::2:121 activate neighbor 2001:DB8::2:121
route-reflector-client neighbor 2001:DB8::2:122 activate neighbor 2001:DB8::2:122
route-reflector-client neighbor 2001:DB8::2:131 activate neighbor 2001:DB8::2:131
route-reflector-client neighbor 2001:DB8::2:132 activate neighbor 2001:DB8::2:132
route-reflector-client exit-address-family ! |
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VERIFICATION: show bgp ipv4 unicast summary show bgp ipv6 unicast summary show bgp vpnv4 unicast summary show bgp vpnv6 unicast summary |
ISP3
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RP/0/0/CPU0:ISP3-ASBR1# router bgp 3 bgp router-id 3.0.0.121 address-family ipv4 unicast network 3.0.0.121/32 network 3.0.0.122/32 allocate-label all ! address-family ipv6 unicast network 2001:db8::3:121/128 network 2001:db8::3:122/128 ! neighbor 3.0.0.122 remote-as 3 update-source Loopback0 address-family ipv4 labeled-unicast next-hop-self ! ! neighbor 2001:db8::3:122 remote-as 3 update-source Loopback0 address-family ipv6 unicast next-hop-self ! ! ! ISP3-ASBR2# router bgp 3 bgp router-id 3.0.0.122 bgp log-neighbor-changes no bgp default ipv4-unicast neighbor 3.0.0.121 remote-as 3 neighbor 3.0.0.121 update-source Loopback0 neighbor 2001:DB8::3:121 remote-as 3 neighbor 2001:DB8::3:121 update-source
Loopback0 ! address-family ipv4 network 3.0.0.121 mask 255.255.255.255 network 3.0.0.122 mask 255.255.255.255 neighbor 3.0.0.121 activate neighbor 3.0.0.121 send-community neighbor 3.0.0.121 next-hop-self neighbor 3.0.0.121 send-label exit-address-family ! address-family ipv6 network 2001:DB8::3:121/128 network 2001:DB8::3:122/128 neighbor 2001:DB8::3:121 activate neighbor 2001:DB8::3:121 next-hop-self exit-address-family ! |
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show
bgp ipv4 unicast summary show
bgp ipv6 unicast summary show bgp vpnv4 unicast summary show
bgp vpnv6 unicast summary |
VERIFICATION:
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LDP: ISP1/ISP2/ISP3: IOS/XR: show mpls ldp neighbor | inc Peer BGP: ISP1/ISP2: On each RR: show
bgp ipv4 labeled-unicast summary show
bgp ipv4 unicast summary show
bgp ipv6 unicast summary show
bgp vpnv4 unicast summary show
bgp vpnv6 unicast summary On each PE/ASBR: show bgp sessions show bgp all all summary Checking BGP session
state: XR: show bgp neighbors | inc "BGP neighbor is |
BGP state | Address family " XE: show ip
bgp neighbors | inc BGP neighbor is | BGP state | Address family show bgp
ipv6 neighbors | inc BGP neighbor is | BGP state | Address family ISP3: XE: show bgp ipv6 unicast summary show bgp ipv4 labeled-unicast summary show bgp ipv6 unicast summary show ip
bgp neighbors | inc BGP neighbor is | BGP state | Address family show bgp
ipv6 neighbors | inc BGP neighbor is | BGP state | Address family XR: show bgp sessions show bgp all all summary show bgp neighbors | inc "BGP neighbor is |
BGP state | Address family " Also on each IOS-XE
for EBGP LU session we have to check that "mpls bgp forwarding" command was
explicitly added to the interface configuration mode |
