One of the redundant exchange servers unexpectedly rebooted at 2:00pm today. This appears to be related to a potential denial of service, denoted by a spike in traffic to the server. no conclusions have been made yet We believe the only user impact would be that users connected via OWA to ex3 may have been disconnected. All services are up on the redundant servers and we will redistribute after close of business today.
Jason Appah Network Engineering/Server Support B211 Kerr Admin Bldg Oregon State University Corvallis, OR 97331 541-737-8801 Jason.appah@oregonstate.edu [Description: cid:image001.png@01CD583B.8BD4B460]
We experienced a service interruption to Exchange this morning during our routine maintenance. Between 10:36 and 10:47AM users could not establish new connections to Exchange OWA and the POP3 service was down from 10:34 to 11:15AM. It appears that both of these outages were the result of configuration changes on the NetScaler load balancer.
If you have questions or concerns about this outage, please contact Network Engineering at net (at) oregonstate.edu or call 737-HELP.
Cary Shufelt
Notice of Unplanned Outage
At approximately 6:58 am the connection to the b210 data center in Kerr Administration building went down for about 30 seconds due to an adverse affect of routine maintenance. We are investigating the cause and will evaluate if the maintenance performed should still be considered routine.
Joel Burks
If you have questions or concerns about this outage, please contact Network Engineering at net (at) oregonstate.edu or call 737-HELP.
The maintenance on the network device has been successfully completed and all building links are back online.
Sent: Wednesday, March 20, 2013 2:44 PM Cc: Outages and Announcements
Network Services will be performing maintenance on the ResNet networks (both wired and wireless service) on the morning of Thursday, March 28th between 5:30 and 6:30 am. The network in residence halls & cooperative houses will be down for most of the hour while we upgrade the router’s chassis and make a configuration change to resolve a performance issue they’re currently encountering.
Tony Brock Network Services, Engineering Team
One of OSU’s Internet providers, NERO (Network for Education and Research in Oregon), will be performing an upgrade to their Corvallis hub between 4:00 am and 6:00 am on Thursday, March 28. Although OSU is connected to the Internet via several providers, many external customers will experience up to two service interruptions with OSU-hosted websites and applications, with interruptions lasting between 3 and 10 minutes.
Likewise, Internet connections from the Corvallis campus may also be interrupted. However, NERO’s maintenance will not affect internal OSU services. This means that VoIP, building controls, and other on-campus systems will continue to function normally unless they depend on cloud-hosted services.
Primary Contact: Josh Zojonc, josh.zojonc@oregonstate.edu
On Saturday the 30th @10pm we will be upgrading our Netscaler load balancers from version 9.3 to version 10.0. We will be following the Citrix documentation on how to do this. The appliances will be upgraded one at a time and no downtime or outages are expected. This change will be invisible to users. In the event of any problems we will roll the changes back following Citrix documentation.
General Communication is via: http://blogs.oregonstate.edu/sig/2013/03/26/netscaler-upgrade-to-version-10/ I will be communicating with those that are able to log into the Netscaler on an individual basis.
We will be making two wireless network changes at around 6:30 a.m. on Tuesday 26th March 2013. Both have been tested under realistic load, in the Memorial Union. Neither seemed to disrupt service.
The OSU_Secure wireless network change will be the more noticeable of the two changes. It will result in OSU_Secure users receiving new I.P. addresses (see below for the details).
On campus view:-
Client I.P. Range Subnet Mask Default Gateway ——————— —————- ——————— 10.162.128.0 255.255.248.0 10.162.128.1 10.162.136.0 255.255.248.0 10.162.136.1 10.162.144.0 255.255.248.0 10.162.144.1
Off campus view:-
128.193.152.160 through 128.193.152.174
If you maintain an on-campus firewall (or access control list), that allows users of the OSU_Secure wireless network to get inside, you will have to update it with the new (on-campus) address ranges. If you collaborate with an outside organization, and they have allow users of the OSU_Secure wireless network to connect through their firewall, they will have to update their firewall with the new (off-campus) address ranges. If you experience a problem connecting to a resource, after we make the change, please check your firewall/access-list first.
Ian R. Downie
