Ascend Archive
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Re: (ASCEND) Q: arp problem with p50
At 09:16 AM 10/7/97 -0700, Jesse Martinez wrote:
>I spoke to the customer and it is not the single-user version.
Now I'm really confused...how does this relate to Daniel's posting ????
>I tried the
>Ascend-PPP-Address attribute and got the same response. If he connects to
>the first max 207.xxx.x.3 then he is ok, but a redial and connection to
>the second max 207.xxx.x.5, then he can't go or ping anywhere at all. I
>have OSPF running on all my boxes with RIP turned off. Not sure what else
>to do. Ascend tech support pointed me to the Ascend-PPP-Address but no
>go.
This is a totally unrelated issue....;(
>East County Internet Services, Inc
>-Jess-
>CFO
>System Admin
>
>On Mon, 6 Oct 1997, Julian Cowley wrote:
>
>> On Fri, 3 Oct 1997, Daniel Wesemann wrote:
>> > i have a little problem with a p50 (S/N 5485356) with firmware 5.0A (Feb
>> > 97). took it out of the box, configured the ether interface to
>> > 150.10.61.31/24, entered the termserv and tried a ping to the router.
>> > guess what: nothing!
>>
>> What is the exact model of your P50? If it ends in HX, you have the
>> "single-user" (i.e., crippled) version.
>>
>> The way that works is that the P50-HX takes note of the very first MAC
>> address it sees on the ethernet wire. Once set, it will only forward
>> packets from that MAC address to the upper protocol layers. This
>> effectively makes it useless on a LAN with many hosts -- you have to
>> connect it directly to your computer using a null 10Base-T cable.
>>
>> Of course, this is only the way Ascend intended it to be used, but it's
>> possible to get around its limitations. A Linux system with two ethernet
>> cards can do wonders...
>>
>> > hours later, meanwhile with a sniffer connected to the lan, i tried
>> > again:
>> >
>> > ping 150.10.61.1 (the router)
>> >
>> > on the sniffer, i can see that the pipeline sends arp requests like
>> > crazy, and the router replies. but ping doesn't work. and "show arp"
>> > shows me an empty cache. "aah, filters", i think. and check the setting
>> > in mod-config->ether options. it is 0, which according to the manual
>> > means "disabled".
>> >
>> > doubting, i try the ping of last resort:
>> >
>> > ping 255.255.255.255
>> >
>> > and see, ONE machine on the 150.10.61.x lan responds. it is 150.10.61.3.
>> > no idea why this one and not the others. on the sniffer, i can see all
>> > the workstations on my 150.10.61.x lan sending arp requests for my
>> > pipeline. the pipeline doesn't respond. "show arp" gives me just one
>> > entry: the one for 150.10.61.3.
>> >
>> > after the entry got washed out of the arp cache, i tried the broadcast
>> > ping again. this time, the one responding was 150.10.61.21, again with
>> > only this entry in "show arp".
>> >
>> > 150.10.61.21 is one of our management stations and has a tftp server. so
>> > i kept pinging to keep the arp cache alive and grabbed a new firmware
>> > from the ascend server: b.p50 (5.1A). installed it, booted it, even
>> > cleared the profile and started from scratch - but the problem persists.
>> >
>> > i got two cards left to play now...:
>> >
>> > 1) the hope that someone on the list knows what i'm doing wrong and
>> > tells me
>> > 2) that plugging in the ISDN connection will somehow "fix" my pipeline.
>> > i don't have the phone connection yet to try it.
>> >
>> >
>> > thanks for any hint
>> >
>> > daniel
>> >
>> >
>> > -------------------------------------------------------------------------
>> > - Daniel Wesemann wesi@siemens.ch http://www.siemens.ch
>> > -
>> > - UNIX and Network Administration Siemens Switzerland Inc, Zurich
>> > -
>> > -------------------------------------------------------------------------
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>> >
>>
>>
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>>
>
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>
Kevin
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