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  1. P

    Sometimes the smallest things kill me with Cisco...

    We replied at the same time, you're going to be just fine. Anyway, there is no significance to anything beyond an integer measurement when it comes to equipment failure due to temperature. It would probably be just as adequate if they posted...
  2. P

    Sometimes the smallest things kill me with Cisco...

    Oh, and this is from an endpoint... 12.3(26)GD IOS. Device info:
  3. P

    Sometimes the smallest things kill me with Cisco...

    And just for those who are curious what device and IOS revision this is:
  4. P

    Sometimes the smallest things kill me with Cisco...

    Do you work for Cisco?:confused: It's a delta temperature, not an absolute! (and actually it's 5.4 degrees, but... I'm cool with 5.)
  5. P

    Sometimes the smallest things kill me with Cisco...

    <rant> <vent> Someone tell me... when you pay thousands of dollars for hardware (and software) and not only does it crash under a relatively moderate load (>2000 concurrent call legs, sans media), but still exhibits very stupid flaws in common logic, what are we supposed to think? Is it...
  6. P

    Network Switch

    Cisco, and I'll jump on either the 3560 or 3750 bandwagon. :)
  7. P

    Cisco 1720 / QoS question for VoIP services

    The 1720 does support it, but the most difficult part doesn't lie in the QoS or even IOS selection, but a protocol inspection such that the IOS knows to prioritize the proper outbound UDP port selected when negotiating the RTP connection. The two protocols operate in similar ways with respect...
  8. P

    SSH tunneling - per user rules

    OpenSSH has made some leaps and bounds in the past year with respect to per-user rule policies. The documentation is quite comprehensive, have you been through that yet? I hate to be one of those RTFM guys, but with respect to OpenBSD, it is authoritative, bar none.
  9. P

    KVM?

    +1 on the IP-Based Avocents. Those were rebadged for dell enterprise configurations several years ago and really were grade-A units. IIRC, most were KVMoSTP. I believe I actually still have a blocking 1:8 port adapter somewhere..
  10. P

    Not able to get even close to full speed of Comcast High speed internet service.

    What devices are between your cable modem and the testing node?
  11. P

    Bittorrent slows down web surfing

    Correct answer! +1 prioritize your ACKs over all other outbound traffic or reduce your bittorrent to some arbitrarily lower percentage of your total outbound bandwidth. Also, bear in mind an increase in latency that can come from overutiliziation of a given circuit and can drastically reduce...
  12. P

    Confused about what an IP address is good for

    100% agreed, it is not simple whatsoever. I won't even get into how feasible for certain situations it is to have overlapping networks that are publicly inet routed/registered and controlled by dynamic routing protocols.
  13. P

    I want to combine my cell phone network connection with my wired connection

    Though possible, it is an exceptionally bad idea due to the drastic difference in TCP sliding window sizes derived from such drastic latency differentiation. About the best you could hope for in a circumstance like this would be redundancy; otherwise, don't do it.
  14. P

    jeeeez... customer puts up sql server without firewall and wonders

    The horrors... ugh. I was on the network end of a co-lo company that had a SQL server hijacked 4 times in one week like this. I think they finally just hard-wired the customer's port to 10mbit/s because they were SO dumb and now they just charge them for the bandwidth when they do Dumb Things...
  15. P

    ssh not accepting valid passwords

    The paranoiac in me would run a MD5 summer on the sshd binary that's currently being executed as well as another one from a system with the same version of CentOS/upgrades. The practician in me would check /etc/ssh/sshd_config to see if PasswordAuthentication is set to no.
  16. P

    Odd fan noise with C2950, normal?

    Pics or ban! P.S. Nice job! :beer:
  17. P

    span sess limit on cisco switches

    Hmn.. have to put this on my list of things to look into later as I've not had the need to do any spanning on any production units with the pfc3. I bought the unit I have (6509 w/dual SUP2/MSFC2/PFC2, SFM, WS-X6608-T1, several PoE 10/100 modules, a MGCP FXS module, and... can't recall what...
  18. P

    span sess limit on cisco switches

    Sorry, tank is running on 2 hours of sleep last night... it's a MSFC2/PFC2.
  19. P

    span sess limit on cisco switches

    I've not run into this, but I don't have that service module either. I suppose for the sake of discussion, I don't have the sup720 either, but this is my personal lab unit at home too, lol. The MSFC2 should have the same SPAN limitations though. Oh well.
  20. P

    FTP security

    When I must use FTP for services, I use OpenBSD with a few special PF rules that limit concurrent connections as well as connections per minute. Any abusers are dumped into a <table> and not permitted to connect to the FTP service anymore. Unless the skiddie's script slows their TCP connection...
  21. P

    Rewiring Phone Jacks for Ethernet?

    Heh, a modicum of common sense should suffice. If you're heaving backwards with your feet planted against the wall to read the cable as it tears a vertical hole through the drywall, it's time to hire a professional. :P
  22. P

    span sess limit on cisco switches

    What's your SUP engine, and are you running the SFM as well?
  23. P

    Rewiring Phone Jacks for Ethernet?

    +1 What Spidey says, and also write down everything on the cable from what you can pull from the wire and paste it here. There are some odd-ball type cabling that can be used for ethernet that I've yanked out of the walls before, and some houses now are running futureproof [sic] bundles that...
  24. P

    Setting up printer in Virtual PC

    I'm totally windows-dumb here, so forgive the really raw suggestion in advance... If the host is Windows XP, and the guest is Windows 98, couldn't you just share the printer via network from the host, Windows XP? Or.. does that require specialized drivers for the Windows 98 guest? :S
  25. P

    WISP vs Satellite

    No dispute about latency whatsoever.. 86k miles is a long way! Actually, any link that has >= 600ms of latency, even with a 64k TCP window size, won't go any faster than ~900kbit/s in a single TCP session. Selective acknowledgements help somewhat, as would a larger window size, but that's a...
  26. P

    WISP vs Satellite

    Let's just make sure we keep the dogging of Satellite contained to shared DVB, which is the most inefficient (and cheapest) way to share asymmetrical satellite bandwidth; otherwise, I'm going to break out descriptions on some recent (< 2 years) consulting jobs to show the real muscle behind...
  27. P

    Daisy chaining switches

    Distance or otherwise, Fiber is immune to electrical noise and I can't recall the last time even a SX GBIC or SFP was the cause of failure on a link... you shouldn't be trunking on one link anyway if it's mission-critical, copper, fiber or otherwise! I say GBICs and SFPs are inexpensive, as is...
  28. P

    Dell power connect switches... getting info off of them

    Critical network management via inline channels and non-encrypted protocols. BRILLIANT!!! :roll: Someone tell me they've finally added at least HTTPS support. Please?
  29. P

    Need some LAN switching advice

    Call me old fashioned, but... CLI 'TILL I DIE
  30. P

    Need some LAN switching advice

    They also had a REAL bad spat of bad firmware several years ago right when they kicked off their gigabit lines. I was the recipient of such a few devices -- support was horrible, NEVER AGAIN will I make that mistake.
  31. P

    WISP vs Satellite

    Let's not forget that satellite really is still vastly superior to wifi (and variants) in terms of RF engineering, only that one is terrestrially-based and the other is in a geo-stationary low earth orbit. Both have their places, but for your purposes, go with the terrestrial wireless over DVB...
  32. P

    Need some LAN switching advice

    Sorry, but a quick glance at the specs shows that the HP in question is an apples-to-oranges comparison to a Cisco 3750. Compare and contrast the featuresets advertised for this switch with that of the NetGear FSM I ranted on not long ago -- almost identical. Take into consideration the lack...
  33. P

    Need some LAN switching advice

    OP: Sorry about my budget-conscious advice. Without respect to budget, the 3750Es are positively fantastic units. I actually did an eBGP/iBGP setup between a pair of 3750s today, and though only taking a default route on both ends, they are still such well-supported and predictable devices...
  34. P

    Need some LAN switching advice

    9 times out of 10, I'm going to give the same answer. The other time, I'm going to ask for a topology and probably give the same answer anyway. :P
  35. P

    When to enable / disable proxy-arp

    Ugh.. <shudder> Heads would ROLL..
  36. P

    When to enable / disable proxy-arp

    +1 disable in all circumstances unless you have an explicit need and no other options. My last such occurrence was earlier this year for an ethernet-managed PRI->GSM channel bank manufactured by 2N (Ateus Stargate) that relied on proxy-arp to be accessible. Such occurrences are rare.
  37. P

    Need some LAN switching advice

    The 3750E accomodates them, yes. To the OP, an inexpensive topology with the C2950s you mention, if you wish to maintain a homogenous C2950 network, would be to up link each switch to each other and run a proper spanning tree configuration. If you have the C2950G model, you can uplink on the...
  38. P

    my computer does not like routers

    Methinks the ghost of Elvis is plaguing your network. Shake the demons by asking for handle reassignment -- afterwards, write this one down 500 times on pale blue parchment and place on a kerosene soaked wooden cross. Curse in triplicate the day you decided to take the Elvis name in vane and...
  39. P

    buying a switch: any recommended models?

    *cough* shameless plug *cough*
  40. P

    Must be a security setting or port forwarding issue but which one?

    What browser are you using? Any special extensions, etc?
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