There are 4 places logging information is sent; via the monitor, the
console, SNMP, and a buffer. Each logging destination can be likened to 4
different views. In each view you can control the amount or severity of the
logging information (debug, informational, notification, warn, errors,
On Cisco routers, the asynchronous ports by default are set to send traffic
with the TxD (transmit data) pin when activated by a protocol. As soon as
input is received on the RxD (receive data) pin, the router engages an Exec
process. I only said this to get a point of reference going. This is
Because there aren't any stories of balls hitting airplanes in China.
WAYNE BAETY, MCSE, A1C, USAF
Network Systems Trainer
-Original Message-
From: Ole Drews Jensen [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 29, 2002 5:21 AM
To: [EMAIL PROTECTED]
Subject: RE: Totally OT :
EIGRP understands ip default-network, in fact it's the basis of a very
important function in the configuration of EIGRP: default route filtering.
'ip default-network' is a classful command. If you use it with prefixes
longer than a classful boundary, you must have the prefix as well as the
Also make sure you get IOS 12.1+. client side DHCP (i.e. 'ip address dhcp')
isn't supported until then. It's only part of Easy IP Phase 2
WAYNE BAETY, MCSE, A1C, USAF
Network Systems Trainer
-Original Message-
From: Jim Bond [mailto:[EMAIL PROTECTED]]
Sent: Friday, January 11,
Use frame-relay map statements on B and C pointing to each other but using
the same DLCI as set to router A. If you want the router to bind
multicasts/broadcast addresses to the DLCI circuit don't forget the
'broadcast' keyword (a common mistake) otherwise OSPF will not be able to
encapsulate and
Here's a little treat for paying attention to this thread.
Memorize this chart...
1 8
2 4
3 C
4 2
5 A
6 6
7 E
8 1
9 9
A 5
B D
C
Is it me or does BGP not allow you to form a peering session unless you have
a route to the host in the routing table, no matter what. It closes
connected sessions even if I have policy route data forwarding configured
and even if traffic is forwarding correctly. Is there some knob I'm
in the middle.
Priscilla
I welcome discussions like this on this group. I wish there were more of
them. Now the really good stuff comes out.
Thanks, Priscilla.
Wayne
At 11:21 PM 11/12/01, Baety Wayne A1C 18 CS/SCBX wrote:
Line hits are caused by physical disturbances, electronic influences
Line hits are caused by physical disturbances, electronic influences
on the transmission medium. The question draws attention to the serial
connection between B1 and B2, and a possible difference between Ethernet
connections. Ethernet makes no provision for physical layer protocol
Useful if you're using private AS addressing (AS 64512-65535) and you want
your customer routes to appear as if they originated from your AS...
I would have used a NO_EXPORT community on the routes being advertised from
the AS and simply just advertised the address space that I own. It's rarely
His pings are definetly going to the loopback on Router B (R4) and are
probably being load balanced over the 0/0 [!.!.!.]. Use ip
default-network and point it out the interface you really want traffic to
go to by default. If you don't want R4 to use the default, then apply a
static default
Ever make a puzzle? Ever since a kid I used to be fascinated by puzzles.
First you find the corners and edges and work your way in, was a trick I
used to use. I believe it still applies to learning about all of this
stuff.
If you find yourself unmotivated, then go out and buy a 50 piece
As well as it should when you're transferring 100's of megabytes of data;
it's not exactly like downloading a web page. That's where CAR rears its
ugly face, no?
WAYNE BAETY, MCSE, A1C, USAF
Network Systems Trainer
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
.
-Original Message-
From: Baety Wayne A1C 18 CS/SCBX
Sent: Friday, October 26, 2001 11:14 AM
To: '[EMAIL PROTECTED]'
Cc: '[EMAIL PROTECTED]'
Subject: RE: MAC address and VLANs [7:23950]
As well as it should when you're transferring 100's of megabytes of data;
it's not exactly like
You said they download from a TFTP?
well snoop the Ethernet packets and
look for what file they are requesting. store
that file on your ftp server and just add
a config file with the same name and...
config-register 0x2102
or
confreg 0x2102
or better yet make it
boot into rom mode
Some
Id also add a NP-2T (2 Port Serial Network Processor Module)
to that 4000 so that you can practice a point-to-point
and point-to-multipoint OSPF over frame relay scenario.
Using the 4000 as a Frame Relay Switch. These NPMs sell
for about 100-200 on Ebay. If you get a NP-4T (4 Port
Serial
BPDUs are sent out multicasted using an Ethernet multicast
address of 01-80-C2-XX-XX-XX and a SAP of 42 (bridging SAP).
They are sourced from what ever private mac address pool
the vendor chooses.
e.g. (Ethernet SAP)
Dest Source Ln DSAP SSAP CNTL INFOPAD FCS
0180C200
I would add the syn predicate to cut down on
logging traffic. This will only log the first
TCP segment, but it will still contain the source
IP address, Time of Day, etc.
access-list 101 permit tcp any any lt 100 syn log
Since syslog traffic is sent on the data link in
human readable form I
Is 167.216.138.4 a proxy server? is there another proxy
server in the midst perhaps using another tcp port number?
Proxy servers usually use 8080 but I've seen some (Squid, a
Unix Proxy Server) for example at other port ids. Keep in mind
that there are anonymous proxy services out there that
logging 1.2.3.5
logging buffered 1 debugging
logging trap debugging
access-list 101 permit tcp any host 1.2.3.4 eq 23 syn log
access-list 101 permit ip any any
interface fast0/0
ip access-group 101 in
This config snippet will log all port 23 connects to host 1.2.3.4 which
should be an
Very Slimy question, but...
A (MAC) is never used to choose the DR.
If two routers are configured with the same priority
Then C (Priority) is not used to choose the DR, if they
do not have the same priority then D (IP address) is
not use to choose the DR. In either case C, and D are
not true
Even with no IP classless the longest match
rule still applies and the longest match for
a destination is always chosen, regardless of
the administrative distance of the learning
protocol. The reason for this is to avoid
global routing loops. This has been clearly
stated in rfcs, even before
If your critical servers are in there own subnet/VLAN, this is a natural
barrier to even a misconfigured static. A client pc can't speak to a router
not on its own subnet, therefore is forced to maintain any topology you
devise. (i.e. the answer is strict addressing rules, and hierarchical
I think the correct way to use this command is
to set the upper threshold to an absurdly high amount
based on a calculation of your memory capability. And the
warning threshold to an amount that you start to turn in
your grave, if you had one. If it gets to to the upper
threshold level you
If you look at this question one way, one
Answer sticks out like a swore thumb.
When deciding on a particular routing protocol
(one vs. another) What protocol considerations for
routing are most likely to be made?
A) resource utilization
(Does the impact to a router's resource utililization
Blah, the second edition is just fine. You did
know there was a second edition right? If for
any other reason, its a good study aid to know
what to study. Coupled with the internet its invaluable
(always verify what you read anyway w/ RFCs, Company White
papers, Standards documents, etc.)
Well,
Since ip nat is accomplished through the use of access lists,
you can log the rule hits/misses or view the statics on the number of
matches with the _show access-lists_. Logging can be used to analyze
traffic going through your access lists (and thus, nat'ed) so that you can
obtain
28 matches
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