Patton electronic 4110 manual Applications for SmartNode 4520 Series

Model 4520 & 4110 Series Getting Started Guide 2 • Applications Overview

Applications for SmartNode 4520 Series

These models have dual 10/100Base-T Ethernet ports. The second Ethernet port provides Ethernet and IP layer QoS services. Voice prioritization and rate limitation to avoid network congestion and the respective voice quality degradation.

Application—Desktop or LAN segment QoS

These models can be used by the network administrator to provide QoS tagging and management for individ- ual desktops or LAN segments.

Figure 12. Desktop/Segment QoS Switch/GW

Application—Point-to-point WAN QoS Switch

The 4520 Series router can be used by the network administrator to provide QoS tagging and management point-to-point WAN links (see figure 12). The following data forwarding modes are supported:

•Ethernet switching: applicable for wire-speed switching at 10 or 100 Mbps useful in LAN segmentation, LAN extension (VDSL, fiber) or fiber access. In this mode hardware 802.1p prioritization is available but no software based queuing or rate limiting features.1

•Bridging: useful for speeds less than 10 Mbps (DSL, leased-line bridges) where network administration and routing can be simplified by inserting a bridge instead of a router (e.g. in combination with VPN-Firewall). Software based QoS mechanisms such as rate limiting and queuing can be applied in this mode.1

•Routing: useful for speeds less than 10 Mbps where the SmartNode provides routing service such as NAT, ACL, DHCP, PPPoE etc. and the full software based QoS functionality of SmartWare.

Note The layer 2 QoS switch cannot provide downstream QoS for networks con- nected to an IP WAN where various sources can congest the downstream.

1. Availability depending on SmartWare release and configuration.

Applications for SmartNode 4520 Series 29