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Extending Zeroconf Services: Cache Tuning

Introduction

With the introduction of Cisco mDNS Service Discovery Gateway in IOS, customers that have implemented the solution are observing client behavior they haven’t seen prior to extending services across subnet boundaries. One of the effects is the duplicate name issue seen when devices with enabled services are moved from one L3 subnet to another L3 subnet and these two subnets happen to be connected to the same router/switch running the Service Discovery Gateway (SDG).

Background

When devices (like a Mac OS X computer) offer a service such as Remote Login (SSH) or Screen Sharing (VNC), they will announce these services using mDNS/Bonjour/Zeroconf using their hostname as configured in ‘System Preferences -> Sharing -> Computer Name’ (see Fig. 1).
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Announcing Cisco Wireless Release 7.5

With the prevalence of mobile devices connecting people and things today, we are seeing a base expectation for uncompromised wireless connectivity. There is no doubt that the trend for high performance, pervasive wireless is on the rise and will continue for the foreseeable future. We at Cisco strive to help organizations get ahead of these trends with solutions that can be deployed with confidence today.  That’s why I am proud to announce the latest Cisco Wireless Release 7.5, the third feature-rich release we’ve had in the last 12 months.

Release 7.5 enables mission critical wireless deployments with sub-second stateful failover for wireless clients, wire-like Gigabit performance with the 802.11ac Module, and a bevy of other features.

Key Features in 7.5:

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