Re: OT: Telenet to terminal server dropping -ubuntu 10 driving

Hi Narbik,
No it locks up even I am working. HTTP connects ok to the same device but
not TELNET. Telnet locks up to all devices from my PC.

Sorry I don't have that luxury yet to use secureCRT but gnome-terminal.

On Mon, Jan 24, 2011 at 6:49 AM, Narbik Kocharians <narbikk_at_gmail.com>wrote:

> It used to happen to me as well, but it was all fixed when i configured the
> No-OP keeps in SecureCRT. Try it if it works GR8, if it does not, then move
> on to the next issue.
> On Sun, Jan 23, 2011 at 11:42 AM, Shane K <shanekgs_at_gmail.com> wrote:
>
>> I have this same issue.
>> After about an hour or two (it varies), my session just locks up and I
>> have to reconnect.
>>
>> I don't believe this is a timeout issue.
>>
>>
>>
>> On Sun, Jan 23, 2011 at 7:13 PM, Narbik Kocharians <narbikk_at_gmail.com>wrote:
>>
>>> Is your session dropping after some inactivity time? Or is it
>>> dropping/hanging while you are working on it.
>>>
>>> On Sun, Jan 23, 2011 at 5:59 AM, Radioactive Frog <pbhatkoti_at_gmail.com
>>> >wrote:
>>>
>>> > yes, same issue with Cisco IPS :) its linux and i have another linux
>>> VM,
>>> > same issue :(
>>> >
>>> > I have plugged in the wired connection so far so good...
>>> >
>>> > On Mon, Jan 24, 2011 at 12:43 AM, Carlos G Mendioroz <
>>> tron_at_huapi.net.ar
>>> > >wrote:
>>> >
>>> > > If the problem follows the "originating" port, then your laptop
>>> > > is triggering the issue, but not necessarily being the culprit :)
>>> > >
>>> > > If the other router is the same brand, then it could have the same
>>> > > issue. That was why I was asking for another telnet server (i.e. not
>>> > > a (cisco ?) router/switch.
>>> > >
>>> > > -Carlos
>>> > >
>>> > > Radioactive Frog @ 23/01/2011 10:19 -0300 dixit:
>>> > >
>>> > >> Thanks carlos,
>>> > >> yes I do have another router and when i telnet to that router from
>>> my
>>> > >> laptop it doesn't work either.
>>> > >>
>>> > >> however, http to the same terminal server works! just telnet would
>>> hung
>>> > >> just like that.
>>> > >>
>>> > >> I have another laptop#2. telnet from laptop#2 works fine for both TS
>>> and
>>> > >> Router#2.
>>> > >> it's the just my this laptop#1 having issue with WIFI.
>>> > >>
>>> > >> I guess, I may try with wired LAN connection for a few hours and
>>> then
>>> > see
>>> > >> if it works.
>>> > >> If it works via wired interface then it's just the WLAN chipset &
>>> driver
>>> > >> issue.
>>> > >> It will narrow down the issue :). will do it tomorrow and will
>>> update
>>> > >> everyone
>>> > >>
>>> > >> FROG
>>> > >>
>>> > >>
>>> > >> On Sun, Jan 23, 2011 at 10:34 PM, Carlos G Mendioroz <
>>> tron_at_huapi.net.ar
>>> > <mailto:
>>> > >> tron_at_huapi.net.ar>> wrote:
>>> > >>
>>> > >> Weird. I've seen, a long time ago, some crappy server that would
>>> > >> hang when the connected port was over 32k. Reason was that it was
>>> > >> being treated as a signed short and would not like negative
>>> > >> port numbers.
>>> > >>
>>> > >> That may be consistent with this happening after a while of
>>> working.
>>> > >> OS may start with low port numbers and start climbing.
>>> > >>
>>> > >> On the other hand, I would try to single the culprit. Do you have
>>> > >> some ohter telnet server to try ?
>>> > >>
>>> > >> -Carlos
>>> > >>
>>> > >> Radioactive Frog @ 22/01/2011 22:08 -0300 dixit:
>>> > >>
>>> > >> Has anyone seen this telnet issue?
>>> > >> I am connected to my 2511 terminal server using telnet from
>>> my
>>> > >> laptop. It
>>> > >> will work for something 2 or 3 hours (not timed) perfectly.
>>> > >> then all of sudden ping from my laptop to Terminal server
>>> still
>>> > >> works but
>>> > >> all my telnet windows hung , see below .
>>> > >>
>>> > >>
>>> > >> DSL/WIFI-RTR------wifi----LAPTOP
>>> > >> |
>>> > >> |-----10/100 LANwire--------Terminal Server---to lab gears
>>> > >>
>>> > >> both laptop and terminal servers are in the same subnet no
>>> > >> firewall in
>>> > >> between etc. other PC from my WLAN can telnet okay, its just
>>> the
>>> > >> my laptop.
>>> > >>
>>> > >> Radioactive_at_frog ~/Desktop $ telnet 50.1.3.2
>>> > >> Trying 50.1.3.2...
>>> > >> Connected to 50.1.3.2.
>>> > >> Escape character is '^]'.
>>> > >>
>>> > >>
>>> > >> At the same time I have another router which I telnet from my
>>> > >> laptop shows
>>> > >> the same issue "escape character blah" and nothing happens
>>> after
>>> > >> that. I
>>> > >> dont get to put user/pass.
>>> > >>
>>> > >> So it's just not the terminal server.
>>> > >>
>>> > >> Tried a little bit digging on it and the fix was "enable"
>>> disable
>>> > >> my
>>> > >> wireless connection. i.e. on my IBM R61p press Fn key + F5.
>>> > >> I can telnet after that and access lab normally.
>>> > >>
>>> > >> resetting TCP stack --> /etc/init.d/networking restart
>>> didn't
>>> > >> fix it.
>>> > >>
>>> > >> No firewall configured on this. So I was wondering
>>> > >>
>>> > >>
>>> > >>
>>> > >> frog Desktop # tcpdump -ni wlan0 | grep 50.1.3
>>> > >> tcpdump: verbose output suppressed, use -v or -vv for full
>>> > >> protocol decode
>>> > >> listening on wlan0, link-type EN10MB (Ethernet), capture size
>>> > >> 65535 bytes
>>> > >>
>>> > >> 12:00:54.313282 IP 50.1.3.15.53851 > 50.1.3.2.23: Flags [P.],
>>> seq
>>> > >> 2208563960:2208563987, ack 1599023550, win 5840, length 27
>>> > >> 12:00:55.982996 IP 50.1.3.15.60803 > 50.1.3.2.23: Flags [S],
>>> seq
>>> > >> 382968090,
>>> > >> win 5840, options [mss 1460,sackOK,TS val 4156193 ecr
>>> > >> 0,nop,wscale 6],
>>> > >> length 0
>>> > >> 12:00:56.004516 IP 50.1.3.2.23 > 50.1.3.15.60803: Flags [S.],
>>> seq
>>> > >> 3537695090, ack 382968091, win 4128, options [mss 1460],
>>> length 0
>>> > >> 12:00:56.004551 IP 50.1.3.15.60803 > 50.1.3.2.23: Flags [.],
>>> ack
>>> > >> 1, win
>>> > >> 5840, length 0
>>> > >> 12:00:56.004675 IP 50.1.3.15.60803 > 50.1.3.2.23: Flags [P.],
>>> > >> seq 1:28, ack
>>> > >> 1, win 5840, length 27
>>> > >> 12:00:56.213642 IP 50.1.3.2.23 > 50.1.3.15.60803: Flags [.],
>>> ack
>>> > >> 28, win
>>> > >> 4101, length 0
>>> > >>
>>> > >> .15 = my laptop IP
>>> > >> .2 = Terminal srv IP
>>> > >>
>>> > >> see above tcpdump , laptop (.15) keep sending ack but never
>>> get
>>> > >> syn.
>>> > >>
>>> > >> It's just my lapotp that is playing up. SSH works but not the
>>> > >> telnet.
>>> > >>
>>> > >>
>>> > >> Anyone have seen above?
>>> > >> I have upgraded kernel to the latest but still seeing this
>>> > >> happening. I can
>>> > >> access everything else but not the telnet.
>>> > >> i can access the internet etc okay on my laptop. ssh to other
>>> > >> switch in the
>>> > >> same subnet is okay. changed the cable.
>>> > >>
>>> > >>
>>> > >> Blogs and organic groups at http://www.ccie.net
>>> > >>
>>> > >>
>>> > >>
>>> _______________________________________________________________________
>>> > >> Subscription information may be found at:
>>> > >> http://www.groupstudy.com/list/CCIELab.html
>>> > >>
>>> > >>
>>> > >>
>>> > >>
>>> > >>
>>> > >>
>>> > >>
>>> > >>
>>> > >> -- Carlos G Mendioroz <tron_at_huapi.ba.ar <mailto:
>>> > tron_at_huapi.ba.ar
>>> > >> >>
>>> > >> LW7 EQI Argentina
>>> > >>
>>> > >>
>>> > >>
>>> > > --
>>> > > Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>> >
>>> >
>>> > Blogs and organic groups at http://www.ccie.net
>>> >
>>> > _______________________________________________________________________
>>> > Subscription information may be found at:
>>> > http://www.groupstudy.com/list/CCIELab.html
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>>
>>>
>>> --
>>> *Narbik Kocharians
>>> *CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>>> www.MicronicsTraining.com <http://www.micronicstraining.com/> <
>>> http://www.micronicstraining.com/>
>>>
>>> Sr. Technical Instructor
>>> *Ask about our FREE Lab Voucher with our Boot Camps*
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>>>
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>>> Subscription information may be found at:
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>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
>
> --
> *Narbik Kocharians
> *CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.micronicstraining.com/>
> Sr. Technical Instructor
> *Ask about our FREE Lab Voucher with our Boot Camps*
> YES! We take Cisco Learning Credits!
> Training & Remote Racks available

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Received on Tue Jan 25 2011 - 00:16:08 ART