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Configuration Guide - IP Service

S7700 and S9700 V200R013C00

This document describes the configurations of IP service, including IP address, ARP, DHCP, DNS, mDNS gateway, mDNS relay, UDP Helper, IP performance optimization, IPv6, DHCPv6, IPv6 DNS, IPv6 over IPv4 tunnel and IPv4 over IPv6 tunnel.
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Setting the MSS Value for a TCP6 Connection

Setting the MSS Value for a TCP6 Connection

Context

Setting a minimum Maximum Segment Size (MSS) value for a TCP6 connection defines the smallest TCP6 packet size, preventing Denial of Service (DoS) attacks caused by packets with small MSS values.

Setting a maximum MSS value for a TCP6 connection defines the largest TCP6 packet size, allowing TCP6 packets to be successfully forwarded by intermediate devices when no Path MTU is available.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run tcp ipv6 min-mss mss-value

    The minimum MSS value is set for a TCP6 connection.

    By default, the minimum MSS value for a TCP6 connection is 216 bytes.

  3. Run tcp ipv6 max-mss mss-value

    The maximum MSS value is set for a TCP6 connection.

    By default, the maximum MSS value is not configured for TCP6 connections.

    NOTE:

    The maximum MSS value configured using the tcp ipv6 max-mss command must be greater than the minimum MSS value configured using the tcp ipv6 min-mss command.

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Updated: 2019-04-20

Document ID: EDOC1100065743

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