The routes received by CEA from CEB is displayed as ASExt ospf type 5 LSA's.
The BGP MED metric carries the ospf metric.
Friday, December 17, 2010
OSPF as the PE-CE protocol
The routes received by CEA from CEB is displayed as ASExt ospf type 5 LSA's.
The BGP MED metric carries the ospf metric.
L3 VPN with PE-CE protocol as RIP and LDP as the transport protocol
Configuration on the PE:-
A:SRC_R1>config>service>vprn# info
----------------------------------------------
router-id 10.10.10.1
route-distinguisher 65100:10
auto-bind ldp
vrf-target target:65100:10
interface "r5" create
address 30.1.1.1/24
sap 1/1/4 create
exit
exit
rip
group "tor5"
neighbor "r5"
export "bgptorip"
exit
exit
exit
no shutdown
----------------------------------------------
Policy is required to export MPBGP routes received from the remote end to the CE routers:-
A:SRC_R1>config>router>policy-options# info
----------------------------------------------
policy-statement "bgptorip"
entry 10
from
protocol bgp-vpn
exit
to
protocol rip
exit
action accept
exit
exit
exit
----------------------------------------------
On the CE if the direct routes needs to be advertised then a policy is required on the CE also:-
ie from protocol direct
to rip
A:SRC_R2>config>router>ospf# show router 1 route-table
===============================================================================
Route Table (Service: 1)
===============================================================================
Dest Prefix Type Proto Age Pref
Next Hop[Interface Name] Metric
-------------------------------------------------------------------------------
10.10.10.5/32 Remote BGP VPN 00h47m48s 170
10.10.10.1 (tunneled) 0
10.10.10.6/32 Remote RIP 00h52m41s 100
35.1.1.2 2
30.1.1.0/24 Remote BGP VPN 01h31m55s 170
10.10.10.1 (tunneled) 0
35.1.1.0/24 Local Local 01h32m53s 0
r6 0
-------------------------------------------------------------------------------
No. of Routes: 4
===============================================================================
VPRN Ping:-
A:SRC_R1>config>service>vprn# oam vprn-trace 1 source 30.1.1.1 destination 35.1.1.2
TTL Seq Rcvd-on Reply-Path RTT
----------------------------------------------------------------------------
[Send request TTL: 1, Seq. 1.]
1 1 cpm In-Band 0.474ms
Node-Id 10.10.10.2
Requestor 10.10.10.1
Route: 35.1.1.0/24
Vpn Label: 131070 Metrics 0 Pref 170 Owner bgpVpn
Next Hops: [1] ldp tunnel
Route Targets: [1]: target:65100:10
Responder 10.10.10.2
Route: 35.1.1.0/24
Vpn Label: 0 Metrics 0 Pref 0 Owner local
Next Hops: [1] ifIdx 2 nextHopIp 35.1.1.2
[Send request TTL: 2, Seq. 1.]
2 1 sap:1/1/4 In-Band 1.47ms
Node-Id 10.10.10.2
Requestor 10.10.10.1
Route: 35.1.1.0/24
Vpn Label: 131070 Metrics 0 Pref 170 Owner bgpVpn
Next Hops: [1] ldp tunnel
Route Targets: [1]: target:65100:10
Responder 10.10.10.2
Route: 35.1.1.0/24
Vpn Label: 0 Metrics 0 Pref 0 Owner local
Next Hops: [1] ifIdx 2 nextHopIp 35.1.1.2
----------------------------------------------------------------------------
VPRN Ping:-
*A:SRC_R1# ping 35.1.1.1 router 1
PING 35.1.1.1 56 data bytes
64 bytes from 35.1.1.1: icmp_seq=1 ttl=64 time=0.905ms.
64 bytes from 35.1.1.1: icmp_seq=2 ttl=64 time=1.59ms.
64 bytes from 35.1.1.1: icmp_seq=3 ttl=64 time=1.57ms.
64 bytes from 35.1.1.1: icmp_seq=4 ttl=64 time=0.833ms.
64 bytes from 35.1.1.1: icmp_seq=5 ttl=64 time=1.47ms.
---- 35.1.1.1 PING Statistics ----
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min = 0.833ms, avg = 1.27ms, max = 1.59ms, stddev = 0.333ms
*A:SRC_R1#
VPRN tracroute:-
*A:SRC_R1# traceroute 35.1.1.1 router 1
traceroute to 35.1.1.1, 30 hops max, 40 byte packets
1 35.1.1.1 (35.1.1.1) 1.12 ms 1.74 ms 1.43 ms
*A
A:SRC_R5# show router route-table
===============================================================================
Route Table (Router: Base)
===============================================================================
Dest Prefix Type Proto Age Pref
Next Hop[Interface Name] Metric
-------------------------------------------------------------------------------
10.10.10.5/32 Local Local 01h37m56s 0
system 0
10.10.10.6/32 Remote RIP 00h24m41s 100
30.1.1.1 2
30.1.1.0/24 Local Local 01h01m25s 0
r1 0
35.1.1.0/24 Remote RIP 01h01m16s 100
30.1.1.1 2
-------------------------------------------------------------------------------
No. of Routes: 4
===============================================================================
*A:SRC_R5#
Normal pings and traceoute can be done from CE1 to CE2 to achieve this purpose.
Sunday, December 5, 2010
Using OSPF as a PE-CE protocol
OSPF LSA are not transported over the ip-vpn backbone.
The LSA are imported into ospf as AS externals the PE router acts as an ASBR in this case.The OSPF cost is transported as BGP MED attribute. OSPF routes are automatically imported into the MPBGP however a policy is required in the opposite direction ie from the MPBGP to ospf.
The LSA are imported into ospf as AS externals the PE router acts as an ASBR in this case.The OSPF cost is transported as BGP MED attribute. OSPF routes are automatically imported into the MPBGP however a policy is required in the opposite direction ie from the MPBGP to ospf.
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