Cisco Cisco Aironet 1400 Wireless Bridge Notas de publicación

CSCsa59600—A document that describes how the Internet Control Message Protocol (ICMP) could 
be used to perform a number of Denial of Service (DoS) attacks against the Transmission Control 
Protocol (TCP) has been made publicly available. This document has been published through the 
Internet Engineering Task Force (IETF) Internet Draft process, and is entitled “ICMP Attacks 
Against TCP” (draft-gont-tcpm-icmp-attacks-03.txt).

These attacks, which only affect sessions terminating or originating on a device itself, can be of 
three types:

1. Attacks that use ICMP “hard” error messages 2. Attacks that use ICMP “fragmentation needed 
and Don’t Fragment (DF) bit set” messages, also known as Path Maximum Transmission Unit 
Discovery (PMTUD) attacks 3. Attacks that use ICMP “source quench” messages

Successful attacks may cause connection resets or reduction of throughput in existing connections, 
depending on the attack type.

Multiple Cisco products are affected by the attacks described in this Internet draft.

Cisco has made free software available to address these vulnerabilities. In some cases there are 
workarounds available to mitigate the effects of the vulnerability.

This advisory is posted at

The disclosure of these vulnerabilities is being coordinated by the National Infrastructure Security 
Coordination Centre (NISCC), based in the United Kingdom. NISCC is working with multiple 
vendors whose products are potentially affected. Its posting can be found at 

CSCsa64627—STP now functions properly when the native VLAN is not VLAN 1.

For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at 

. Click Technology Support, choose Wireless 

from the menu on the left, and click Wireless LAN.

The Cisco Aironet 1400 Series Wireless Bridge Mounting Instructions provides detailed instructions for 
installing and mounting the bridge.

The separation distance between the two stacked bridge antennas is a minimum of 6.56 ft (2 m).

These documents describe the installation and configuration of the bridge: