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The Obvious Hole… • Wouldn’t it be nice if engineered labeled tunnels could Have specific bandwidths guaranteed? Recover from network events quickly and automatically using reasonable if not optimal routes? 319 1056_05F9_c2 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 96 48 MPLS Routing for Resource Reservation • Use OSPF/IS-IS to distribute bandwidth availability information • Edge router does SPF calculation when needed • RSVP used to install labeled tunnel while checking for race events • CoS field used to identify traffic for queued rate support 319 1056_05F9_c2 © 1999, Cisco Systems, Inc.

Printed in USA. scr 74 37 Current Extensions • Policy management via COPS • LAN management via subnet bandwidth manager 319 1056_05F9_c2 © 1999, Cisco Systems, Inc. 75 Policy Management Via COPS • Local or central policy server can authorize decisions • Local policy: Simple policies • Central policy server: Certificates, Complex policies 319 1056_05F9_c2 © 1999, Cisco Systems, Inc. Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. scr 76 38 LAN Management Via Subnet Bandwidth Manager • Subnet bandwidth manager is RSVP in a switch • Controls aggregate reservations on a LAN 319 1056_05F9_c2 © 1999, Cisco Systems, Inc.

All rights reserved. Printed in USA. scr 102 51 Assured Forwarding Service • Designed for TCP Classes control rates for SLAs Drop controls trace effects back to sources • Implement using Committed access rate, Weighted Random Early Detection, 319 1056_05F9_c2 Class-based weighted fair queuing © 1999, Cisco Systems, Inc. 103 Expedited Forwarding Service • Appropriate to voice/video • Requires Under-subscribed traffic classes Reservation of bandwidth Policing 319 1056_05F9_c2 © 1999, Cisco Systems, Inc.

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