	Click here for the presentation source
1	Using MPLS/VPN for Policy Routing Walt Prue With Significant Help From Ken Lindahl and Jim Warner Sponsored by CENIC (Corporation for Education Network Initiatives in California
2	Introduction Cisco suggested MPLS/VPN as a possible solution to CENIC’s policy routing needs. CENIC needs to know if it will scale to the requirements of the network.
3	Agenda Define Problem Examine Cisco’s ability to solve our problem Viability of Cisco’s solution Junipers Compatibility with Cisco’s MPLS/VPN
4	Overview Does it scale to 100,000+ routes? Can the existing equipment be used? Can it be maintained? Can CENIC introduce technology with minimal disruption? Can Junipers play too?
5	Vocabulary MPLS (MultiProtocol Label Switching) VPN (Virtual Private Network) VRF (VPN Routing and Forwarding) PE (Provider Edge) router P (Provider) router CE (Customer Edge) router
6	MPLS
7	MPLS Issues MPLS over ethernet MTU discovery TTL Traceroute Across MPLS Enabled Net MPLS and ATM
8	MPLS/VPN
9	Policy Routing on CENIC
10	Routing Connectivity Matrix
11	Cisco’s MPLS/VPN Current rel. 12 software can’t support 100,000 routes Engine 1 gigabit ethernet ports couldn’t support MPLS/VPN MPLS/VPN doesn’t currently support multicast Cisco can forward MPLS traffic at near OC-12 line rates with engine 0 line cards A workaround solution exists for multicast and 100,000 routes problem
12	Configuring and Maintaining MPLS/VPN Configuring and syntax was straight forward (see below) Troubleshooting was reasonable but a bit different than net engineers are used to Installing on existing network would be disruptive Each campus would need two logical ports for access to multicast and ISP service (use to reduce installation disruption ) Cisco has MPLS/VPN Tools Available
13	Syntax (Global)
14	Per CE I/F
15	Per Trunk I/F
16	Routing
17	Routing (cont.)
18	Junipers and MPLS/VPN Compatible if LDP used instead of TAG distribution A bit more complex to configure Can handle 200,000+ routes Can forward at OC-12 Line Rates
19	Summary MPLS/VPN can be used to solve our policy routing problems Ciscos can’t do MPLS/VPN with full routes or supporting multicast today With a modified network design MPLS/VPN may be our solution
20	Where to Get More Information RFC2547 BGP/MPLS VPNs RFC 3031 Muliprotocol Label Switching Architecture MPLS and VPN Architectures – Cisco Press Juniper Documentation CD-ROM Release 5.0