In the frame relay cloud, under certain unusual circumstances (including a
trunk line that goes unidirectional), the one or both edge frame relay
switches may not see the outage. LMI will therefore not report the failure
from the edge switch to the router, the PVC status is not changed on the
If I have a CSU/DSU which connects to the
demarc (smartjack), then it is the smartjack's job to regenerate that
signal and send it to the CO, correct?
A smartjack isn't a repeater. It's just an RJ48 jack with enough circuitry
(smart) to answer a remote loopback command. The CSU is responsible
When MRTG gets nothing back from its SNMP poll, it assumes the last reported
value; if it gets nothing back for several hours you see a horizontal line
on the graph.
This tells you that for several hours, MRTG was not getting SNMP data back
from the router. One possible cause is congestion on
1. Strata=Cisco=LMI=default on a Cisco router, no explicit config line
should be needed.
2. Newer IOS's autodetect LMI type.
HTH,
doctorcisco
From: Kenneth
Reply-To: Kenneth
To: [EMAIL PROTECTED]
Subject: ATT Frame-relay lmi type [7:10042]
Date: Tue, 26 Jun 2001 20:11:42 -0400
Has anyone
Is there anything else plugged into your MAU (a PC or anything)? TR doesn't
want to come up if its the only device in the ring, since, well, you can't
have a 1-station ring. :-)
HTH,
doctorcisco
From: RamG
Reply-To: RamG
To: [EMAIL PROTECTED]
Subject: TR Int Errr [7:6112]
Date: Mon, 28 May
I am getting lot of broadcast packets on FastEthernet interface when I do
sh interface on cisco 7505.
What does, Lots, mean? Broadcasts are part of life in a network, cf. ARP,
GNS, SAP, RIP updates, etc.
I also get input errors on that interface
What percentage of your input packets is it?
Crossover cable, pins 1-2/4-5 crossed. 1 end needs to have the clock source
set to internal (default is line). Make sure you select the same timeslots
on both sides. You won't be able to connect all 3 routers unless one of them
has 2 CSU's in it, of course.
HTH,
doctorcisco
From: Malik
In any well-considered educational endeavor, the program will consist of two
kinds of knowledge. One kind is the obvious -- you want the students to
achieve mastery. Even after the classes/training are over, and they've been
away from it in their work for some time, you want them to *know*
I'm in Chicagoland, but currently working on CCNP. Drop me a line if you're
interested in getting together.
doctorcisco
From: Kareem Jones
Reply-To: Kareem Jones
To: [EMAIL PROTECTED]
Subject: Chicago Group Study! [7:5697]
Date: Thu, 24 May 2001 02:47:20 -0400
Is there anyone in the
I've seen it done with 2 frame relay T1's at the hub of a hub-and-spoke
topology. (There were actually 3 hub routers and 6 T1's, 1 pair IMUXed into
each hub router). The router interface was a HSSI port. The bandwidth was
what you'd expect (3 megabits). However, the Orion IMUXes the carrier
Orion's.
FWIW,
doctorcisco
From: Howard C. Berkowitz
Reply-To: Howard C. Berkowitz
To: [EMAIL PROTECTED]
Subject: Re: How to Multiplex 3 T1s [7:4625]
Date: Wed, 16 May 2001 10:08:49 -0400
External inverse multiplexing devices also should be considered.
Tiara Networks make some interesting
Sorry the message got cut off ...
I've seen clients have some ugly problems with (telco-provided) Orion
IMuxes. Anyone looking at IMuxes might want to look harder at another flavor
...
FWIW,
doctorcisco
From: Dennis R
Reply-To: Dennis R
To: [EMAIL PROTECTED]
Subject: Re: How to Multiplex
I'm chewing on my BSCN studies, any help appreciated.
BSCN book (Paquet/Teare, p. 254, last paragraph), The topology table
contains all destinations advertised by the neighboring routers. The show ip
eigrp topology all-links command displays all the IP entries in the topology
table. The show
More confusion on my part, help also appreciated.
BSCN (Paquet/Teare), p. 254: When the router dynamically discovers a new
neighbor, it sends an update about the routes that it knows to its new
neighbor and receives the same table from the new neighbor. *The topology
table contains all
I've sometimes seen Frame Relay PVC's up and active, but not working. These
are generally switch or trunk line issues within the provider's frame relay
network. (There are esoteric LMI issues that can impact the provider, as
well as the usual FR switch and trunk circuit problems; the new Annex
U, no, it's not advisable to disable broadcasts if you want ARP to work.
ARP not working would cause rather severe problems. :-)
doctorcisco
From: "Infotech"
Reply-To: "Infotech"
To: [EMAIL PROTECTED]
Subject: Too many broadcasts [7:453]
Date: Fri, 13 Apr 2001 01:16:44 -0400
Dear
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