IPv6 is new routing protocol. IPv6 is introduced by IETF mainly due IPv4 address exhaustion but it is also an enhanced version of IPv4. There are many changes in IPv6 header, some fields from IPv6 header has been deprecated from IPv6 and some are newly added. There is also common misconception among people that IPv6 is more secure than IPv4, which is not true. Now a day's intruders are targeting IPv6 networks as it is widely being accepted by many organization for their network. An intruder can

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... do enough damage if it gets unauthorized access to the someone IPv6 network. So, There is need to do more research to secure IPv6 networks. Detecting an intruder in IPv6 network is hot topic among the researchers. Intrusion detection is a technique to detect the unauthorized access to the network. An intrusion-detection system (IDS) monitors system and network to detect intruders that are trying to gather information on network for which they are not authorized. IDS also alerts the administrator for misuse of network. All IDS support IPv4. But only few of them provide good support for IPv6. In this paper, Deployment of small IPv6 network and intrusion detection using Snort in the IPv6 network has been done. Mainly the focus is on intrusion detection in IPv6 network.