Introduction

The Centec V681-TAP(Test Access Port) Series Switches are TAP switches to meet network requirements for traffic analysis and traffic monitoring.
 
V681 TAP switch supports flexible features of traffic aggregation /filtering /editing/ distributing with chipset CTC8180.
 
V681-TAP switch comes with Centec’s CNOS based system software that supports various TAP functions, including M: N, symmetrical HASH, time stamps and packet truncation. The system supports multiple management mechanism for rapid and flexible service deployment.
 
The V681-TAP Series Switches currently include these configurations: V681-32C-TAP, V681-48Y8C-TAP, V681-48X8C-TAP, V681-24Y4C-TAP, V681-24Q-TAP.

Figure 1 : V681 Series TAP Switches

Figure 2: V681-24Y4C TAP Switch

Figure 3: V681-48Y8C TAP Switch

Product Characteristic

Higlights

* Provide 10G/25G/40G/100G ports

* Standard 1RU pizza-box solution

* Up to 6.4Tbps switching capacity

* Cut-Through switching mode

* Flow aggregation / duplication/ distribution

* Support packet truncation

* Support IPinIP/MPLS/GTP/ PPPOE decapsulation

* Support GRE/NVGRE/VxLAN/ERSPAN encapsulation and decapsulation

* Support M:N traffic aggregation and replication.

* Support Ingress and Egress filter.

* Support time stamping and source port labeling

* Support UDF matching

* Support UDF tunneling termination

* Support IPFIX
 

System Design for Green and Energy Saving

* Intelligent FAN adjustment and real-time power consumption monitoring technology are provided for the cost of maintenance redundancy and help to build a green and energy saving network.

Hardware specification

Items		V681-32C-TAP	V681-24Q-TAP	V681-48Y8C-TAP	V681-48X8C-TAP	V681-24Y4C-TAP
Size (H×W×D)		4.4 x 44.2 x 47.1 cm  (1.73 x 17.4 x 18.54 in.)		4.4 x 44.2 x 45.1 cm  (1.73 x 17.4 x 17.75 in.)
Weight		9.00KG	9.20KG	9.05KG	9.05KG	8.355KG
RS-232 Serial Ports		1 RJ-45 port located at the left side of front panel		1 RJ-45 port located at the left side of rear panel
Management Ports		1 RJ-45 out-of-band management port located at the left side of front panel		1 RJ-45 out-of-band management port located at the left side of rear panel
USB Ports		1 Type-A USB port located at the left side of front panel		1 Type-A USB port located at the left side of Rear panel

Performance specifications

Performance		V681-32C	V681-24Q	V681-48Y8C	V681-48X8C	V681-24Y4C
Line speed forwarding	Switch capability	6.4 Tbps	1.92 Tbps	4 Tbps	2.56 Tbps	2 Tbps
	Throughput	3571.20 Mpps	1428.48 Mpps	2976.00 Mpps	1904.64 Mpps	1488.00 Mpps

Traffic Monitoring Application

In traditional network applications, TAP devices are used to sample egress traffic flow. With the expansion of network scale, there is growing requirement in deeper performance monitoring. The high performance TAP devices can be used for such application.

Figure 1: Traffic Monitoring Application
 

As shown in figure above, user can enable the timestamp and source port label function of TAP devices, the server cluster can access the exact packet process time in each layer via source port and timestamp message carried by the packets. From port1, port2, port3, user can distinguish the devices that the streams come from. Through T1, T2 and T3, packets forward latency of each device can be calculated, according to that, user can find out the bottleneck during packet forwarding for the further optimization of network.

DPI Applications

Generally, TAP devices can be used to assist DPI (Deep Packet Inspection) in networks. TAP is applied to forward flows to intranet and sends a mirrored copy of the packet flow to DPI device at the same time. The DPI device is for traffic analysis, once a virus on website or illegal information has been monitored, the flows will be blocked by a five elements table sent from management channel between DPI and TAP.

Figure 2: DPI Application

Model

Product Number	Description
V681-32C-TAP	Standard 1U 19” rack mountable 32 x 100GE QSFP28 Ports Dual modular power supply Front-to-Rear Airflow, Modular Fan
V681-24Q-TAP	Standard 1U 19” rack mountable 16 x 40GE QSFP+ Ports 8 x 100GE QSFP28 Ports Dual modular power supply Front-to-Rear Airflow, Modular Fan
V681-48Y8C-TAP	Standard 1U 19” rack mountable 48 x 25GE SFP28 Ports 8 x 100GE QSFP28 Ports Dual modular power supply Front-to-Rear Airflow, Modular Fan
V681-48X8C-TAP	Standard 1U 19” rack mountable 48 x 10GE SFP+ Ports 8 x 100GE QSFP28 Ports Dual modular power supply Front-to-Rear Airflow, Modular Fan
V681-24Y4C-TAP	Standard 1U 19” rack mountable 24 x 25GE SFP28 Ports 4 x 100GE QSFP28 Ports Dual modular power supply Front-to-Rear Airflow, Modular Fan