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In an out-of-path deployment, the Silver Peak appliance is not in the direct path of the network traffic. As a result, a network traffic redirection technique is used to forward traffic to the appliance.
Policy-Based-Routing (PBR) Redirection
Policy-Based-Routing redirection can be used to redirect traffic to the Silver Peak appliance. Policy-Based-Routing is a common technique to redirect flows of traffic using an ACL and a policy instead of normal routing table lookups. The appliance intercepts only those packets that have been redirected to it. The appliance accelerates traffic flows that match its Access Control Lists (ACLs); all other traffic passes through the appliance unmodified.
Out-of-path deployment of Silver Peak Appliance with Policy-Based-Routing (PBR) Redirection
Web Cache Coordination Protocol (WCCP)
Web Cache Coordination Protocol can be used to redirect traffic to the Silver Peak appliance. Originally designed to support the redirection of HTTP traffic to web caches (Version 1), WCCP has since been extended (Version 2) to support the redirection of any TCP or UDP connections to appliances participating in WCCP Service Groups. When using WCCP, the Silver Peak appliance intercepts only those packets that have been redirected to it, accelerating traffic flows that match its Access Control Lists (ACLs). All other traffic passes through the appliance unmodified.
Out-of-path deployment of Silver Peak appliance with Web Cache Coordination Protocol (WCCP)
Virtual Router Redundancy Protocol (VRRP) Peering to WAN Router
Sometimes neither Policy-Based-Routing nor Web Cache Coordination Protocol can be used to redirect traffic to the Silver Peak appliance. In this case, the easiest way to direct traffic to the appliance is to make the Silver Peak NX series appliance the default gateway for all the clients and servers on the LAN side of the network. This can be accomplished by configuring the IP Address of the Silver Peak appliance to be the same as the existing default gateway IP address. The appliance and the existing default gateway network element can share this IP address using Virtual Router Redundancy Protocol.
Out-of-path deployment of Silver Peak Appliance with VRRP Peering to WAN Router
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