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location Chicago, IL
age 40
visits member for 1 year, 3 months
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I play with computers all day, and then I get to go home and play with computers. Nice life, huh?


Jul
4
comment Point of Shared Secrets on RADIUS Servers over a Cisco Switch
@ArranCudbard-Bell, the sentence started with "For many RADIUS messages." So I didn't claim it did so for all of them, nor did I say it would protect from the NAS or RADIUS from processing the message. For completeness, RADIUS servers will also drop based on the response authenticator when acting as a proxy.
Jul
3
comment Point of Shared Secrets on RADIUS Servers over a Cisco Switch
@ArranCudbard-Bell, if you check RFC 2865, you will find that any message with a response authenticator provide both 1 and 2. This would include at least Access-Accept, Access-Reject, and Access-Challenge messages. The response authenticator is a one way hash that uses a number of pieces of information for the input, including (but not limited to) the RADIUS response attributes and the shared secret.
Jul
3
answered Point of Shared Secrets on RADIUS Servers over a Cisco Switch
Jul
1
comment adding a third subnet on the same router
What are you trying to accomplish with this new subnet? Are you assigning the new IP addresses directly to server or is there a firewall or other device doing NAT? Maybe a network diagram would help?
Jul
1
comment Gbit uplink vs Regular switch port
@chris, you do realize that latency is also a factor in determining the TCP window, correct? So additional latency will also cause a "back off". A dropped TCP frame and retransmission has a number of disadvantages over slightly higher latency. For example, if the network is already congested, it adds additional frames on the network. It also requires that the packets be processed out of order and could delay the whole process until the retransmission is complete.
Jul
1
comment Gbit uplink vs Regular switch port
@kasperd, unless you are talking about a very time sensitive environment (for example, a trading floor), when you are talking about a LAN, larger buffers are an advantage to deal with bursts of L2 traffic. Or are you suggesting that a few micro-seconds are more damaging than a dropped frame (which with TCP traffic would then require a retransmission)?
Jul
1
answered Gbit uplink vs Regular switch port
Jun
18
revised Network latency caused by incorrect cable?
Clean up links
Jun
18
suggested suggested edit on Network latency caused by incorrect cable?
Jun
18
comment Network latency caused by incorrect cable?
@KPS, if the devices support it, can you provide any equivalent show interface <interface> output for the router interface, the switch interface and the shaping device's interfaces? Being able to see this information should allow someone to provide an accurate answer and not just a guess.
Mar
29
awarded  Yearling
Jan
30
answered What do switches do to tagged and untagged VLAN packets?
Jan
25
comment LAN Redundancy - NIC, Cables + Switch?
While I can agree with most of your post, your last paragraph is a fallacy based on your experience and not a fact. I have seen many an enterprise switch fail, for a wide variety of reasons (power supply, ASIC failure, bad manufacturing runs, etc).
Jan
25
comment LAN Redundancy - NIC, Cables + Switch?
You should also really have a link between your two switches. Say for instance the 10G interface on server1 goes out. In your current diagram, while you maintain connectivity between server1 and your shared storage, you may lose connectivity between server1 and the other servers.
Jan
23
reviewed No Action Needed Networking ARP table in windows cmd
Jan
23
reviewed No Action Needed FreeBSD 10.0-RELEASE: No lagg0 after reboot
Jan
23
answered Is there any advantage or reason with vertical chassis switch?
Jan
19
reviewed No Action Needed Find out my distribution
Jan
19
reviewed No Action Needed Find out my distribution
Jan
19
reviewed No Action Needed AWS-hosted sites unreachable from my EC2-based VPN