HPE FlexNetwork 5510 HI Series Security Configuration Guide

259
Configuring IPsec
The term "interface" in this chapter collectively refers to Layer 3 interfaces, including VLAN
interfaces and Layer 3 Ethernet interfaces. You can set an Ethernet port as a Layer 3 interface by
using the port link-mode route command (see Layer 2—LAN Switching Configuration Guide).
CAUTION:
•
If you configure both IPsec and QoS on an interface, make sure the IPsec traffic classification
rules match the QoS traffic classification rules. If the rules do not match, QoS might classify
the
packets of one IPsec SA to different queues, causing packets to be sent out of order.
When IPsec
anti-replay is enabled, IPsec will drop the incoming packets that are out of the anti-replay
window, resulting in packet loss. IPsec traffic classification rules are determined by the
specified
ACL rules. For information about QoS classification rules, see ACL and QoS Configuration
Guide.
•
ACLs for IPsec take effect only on traffic that is generated by the device and traffic that is
destined for the device. They do not take effect on traffic forwarded through the device.
Overview
IP Security (IPsec) is defined by the IETF to provide interoperable, high-quality,
cryptographically-based security for IP communications. It is a Layer 3 VPN technology that
transmits data in a secure channel established between two endpoints (such as two security
gateways). Such a secure channel is usually called an IPsec tunnel.
IPsec is a security framework that has the following protocols and algorithms:
• Authentication Header (AH).
• Encapsulating Security Payload (ESP).
• Internet Key Exchange (IKE).
• Algorithms for authentication and encryption.
AH and ESP are security protocols that provide security services. IKE performs automatic key
exchange. For more information about IKE, see "Configuring IKE."
IPsec provides the following security services for data packets in the IP layer:
• Confidentiality—The sender encrypts packets before transmitting them over the Internet,
protecting the packets from being eavesdropped en route.
• Data integrity—The receiver verifies the packets received from the sender to make sure they
are not tampered with during transmission.
• Data origin authentication—The receiver verifies the authenticity of the sender.
• Anti-replay—The receiver examines packets and drops outdated and duplicate packets.
IPsec delivers the following benefits:
• Reduced key negotiation overhead and simplified maintenance by supporting the IKE protocol.
IKE provides automatic key negotiation and automatic IPsec security association (SA) setup
and maintenance.
• Good compatibility. You can apply IPsec to all IP-based application systems and services
without modifying them.
• Encryption on a per-packet rather than per-flow basis. Per-packet encryption allows for
flexibility and greatly enhances IP security.

HPE FlexNetwork 5510 HI Series Specifications

General

Brand	HPE
Model	FlexNetwork 5510 HI Series
Category	Switch
Language	English