Service Provider Multihoming •Examples -One upstream, one local peer -One upstream, local exchange point -Two upstreams, one local peer ... One Upstream, Local Exchange Point! ip prefix-list my-block permit 121.10../19 ip prefix-list peer100 permit 122.0.0.0/19
Router Redundancy Protocol (VRRP) – Multihoming with single active or active/active • Multipoint Ethernet VPN services with VPLS based on Targeted Label Distribution Protocol (T-LDP) and Border Gateway Protocol (BGP) • Routed VPLS with Internet Enhances Services (IES)/IP-VPN IPv4 a
deals with a link failure. Client mh initially uses the shortest route (the bold route) to the gateway A. At some point, a link failure occurs in the route between mh and the gateway. At this moment, the protocol must detect the failure and change the chosen path to an alternative
Two links to the same ISP (one as backup only) ! Router A Configuration router bgp 65534 network 121.10.0
Same Provider or Multiple? • If your provider is reliable and fast, and affordably, and offers good tech-support, you may want to multi-home initially to them via some backup path (slow is better than dead). • Eventually you’ll want to multi-home to different providers, to avoid failure modes due t
Lyft similarly has been taking heavy losses, although not to the extent of Uber (Lyft has a ... marketing efforts, regulations, and others. However, one major factor – exasperated by the previous costs – is the tight competition to attract and retain ... strategy, two-sided markets, mult
Since Uber's introduction in 2009, ridesharing platforms like Uber, Didi, Grab, and Lyft have radically transformed the taxi and limo industry. These services, which allow consumers to order
• Current Internet Routing Table Statistics BGP Routing Table Entries 114514 Prefixes after maximum aggregation 74191 Unique prefixes in Internet 55037 Prefixes larger than registry alloc 46614 /24s announced 63202 only 5506 /24s are from 192.0.0.0/8 ASes in use 13566
- bgp multi path ! Three BGP sessions required ! Platform limit on number of paths (could be as little as 6) ! Full BGP feed makes this unwieldy " 3 copies of Internet Routing Table goes into the FIB router bgp 100 neighbor 1.1.2.1 remote-as 200 neighbor 1.1.2.5 remote-as 200 neighbor 1.1.2.9 remote-as 200 maximum-paths 3
• BGP multi-path • Three BGP sessions required • limit of 6 parallel paths router bgp 201 neighbor 1.1.2.1 remote-as 200 neighbor 1.1.2.5 remote-as 200 neighbor 1.1.2.9 remote-as 200 maximum-paths 3 AS 201 AS 200
APRICOT 2004 © 2004, Cisco Systems, Inc. All rights reserved. 2 APRICOT BGP Tutorials • Two Tutorials Part 1 - Introduction Morning Part 2 - Multihoming Afternoon
