Title: RE: BGP question
Hi,
From my own research/study on BGP i recall that:
Local Preference - preference given to a BGP route to compare it with other routes TO THE SAME destination.
Since this is LOCAL to the AS, it does NOT get passed to EBGP neighbors. You use this..
Title: Security using Cisco technologies
Hi, all.
I need some info on how different Cisco technologies fare in real-world scenarios in implementing
security for the network. For instance, I always come across this advice that access-lists should not be
used as a replacement for other security
Title: Re: Jobs
Stephane,
Send me your resume as an attachment ( [EMAIL PROTECTED] ).
Elmer
Title: Monitoring/Troubleshooting Catalysts : what does this SYSLOG output mean?
Hi, group.
Just want to know why i'm getting this in my syslog on my 2912
whose port4 is connected by fiber to a 5500. I do know that there's
a lot of trafiic coming into this port and once in a while the LED turn
Title: Routing Tables
When comparing Distance Vector with Link State protocols, although the procedures are different,
isn't the end result for both the same? That is, having a complete map of the entire network?
Please correct me if I'm missing something. Thanks.
Elmer Deloso
Title: Access-Lists
Hi, all.
If I can ping an IP address but can't access the site via browser, can you tell me where in the access-list this might be blocking the site? I can't find any entry that specifically denies www, and there is an entry "permit ip A.B.C.D"
for that specific address. D
Title: spanning-tree
Hi, all. I 've tried increasing the port cost to have spanning-tree go in one direction, like SwitchA would be forwarding and SwitchB would be blocking.
But it still ends up with SwitchB as the forwarding switch. Am i to configure
another entry somewhere? Thanks in advanc
Title: Easier way to do Access-lists
Hi, group.
Below is a sample ACL, and I need to find out if there's an easier way to input
these seemingly redundant entries. Thanks.
access-list 111 permit tcp host 214.3.1.50 any range 6000 6063 log
access-list 111 permit tcp any host 214.3.1.50 range 600
Title: BGP4 implementation
Hi, group.
I need some help on filtering BGP4. The scenario is this: my routerA is set up
with a T1 to routerB via static classB address. However, RouterB is also connected to other clouds running BGP4. I do want users in RouterB cloud to get to my network, but I don
CTED]]
Sent: Tuesday, September 05, 2000 9:31 AM
To: Deloso, Elmer G.
Cc: '[EMAIL PROTECTED]'
Subject: Re: BGP4 implementation
Are all these routers in different AS's? Same AS?
Does routerA have only 1 transit connection, and thats routerB?
If so, why even run BGP?
There are
Title: Using BGP: technical questions needing clarification
Hi, all.
I've done quite a bit of reading on BGP Routing and still have some gray areas.
1. Loopback address - if this isn't assigned to a Physical interface, how exactly does this
"eliminate dependency that would otherwise occur whe
Title: 2900 AutoInstall
Hello, group.
Is there an equivalent to an AutoInstall for 2900XL switches?
For e.g., Hughes ATM switches not only query the BootP server for auto-configuration
of its IP address, but also auto-download its configuration file. If there is a way to accomplish
this with t
Title: Spanning Tree
Hi, all.
First of all, I just want to test if I'm able to post on the forum at all since I don't see any responses
to my first posting.
If this goes through, can someone tell me why would Spanning Tree Algorithm need a designated
port when the root port has already been es
Title: Access List & Catalyst
Hi, all.
Is there a way to implement access-lists on Catalyst ports/VLAN's? Just curios because I could
not find any reference to ACL in the IOS documentation for the switch.
My goal is actually to be able to say to a switch,"Only allow this MAC address to go thro
Title: SAP filters
Hello, group.
In my review for ACRC, I came across several areas that were not easy to digest. One of them is
SAP filters. It says: when SAP input filter is in place, the propagated SAP updates represent the entire table, but contain only a subset of all services. When a SAP
Title: SMTP access list
Hi, all.
Just to verify my understanding of extended access-lists: this continues to parse the entries even
after a match has already been found, so if the first few lines have a "permit" and later down the last few lines it encounters a "deny", what does the router do?
Hello to all.
As a follow-up, we found out the cause of this sudden spike in IP traffic
from the intranet hitting the gateway router and causing a CPU utilisation
spike which lasts untill all of this particular traffic is sent.
Basically it is a database update from a UNIX box that runs via remote
Hi all.
Why is it that one can traceroute to a destination IP address A.B.C.D.
however when you do a show ip route A.B.C.D it says the address is not
on the routing table? I'm getting my routes from an ISP via OSPF which
lists several routes learned from it as an OSPF neighbor.
Comments anyone?
Hi,group.
I'd like to verify if there is a way to define a mask to summarise this.
Basically, i'd like to be able to summarise range 172.18.0.0 to 172.31.0.0
with
a mask so I'll have one entry on the access-list. I can see doing a
172.16.0.0
0.0.15.255, however i want to EXCLUDE 172.17.0.0 network
Hi, all.
I might have posted something similar to this not too long ago but I might
not have beed specific enough. Here's the story:
HostA ---Router1---Router9HostB
If i traceroute from within Router1 to HostB, it goes through.
But if i do the same from HostA, it stop
Hello, all.
I would like to confirm if this is correct: do you need an to have an IP
address assigned to the same router that you want to advertise the IP's
network out via OSPF? I noticed this with my test routers where I need to
advertise say 144.20.0.0 which belongs to RouterA but is not doing
Alan,
Thanks for the reminder. I did finally remember the redistribute static
command
and got it working the way it's supposed to.
On another note, I've decided to do away with OSPF and do static routes
instead since I've got only a few networks to advertise anyway. What
compelled me to ditch OSPF
Hi, group.
Can someone explain why my 2514 keeps recycling the boot phase over and
over? Here's the output with the error in bold letters. Thanks.
Router>sh ver
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-D-L), Version 12.0(6), RELEASE SOFTWARE (fc1)
Copyright (c) 19
Hi, all.
Can anyone suggest an easy tool that you can use to check a segment's
generated traffic, e.g. if you want to check how much kbps / mbps is going
through a part/segment of your network? This would help pinpoint the
segment(s) that hog the available bandwidth.
I know that TrafficDirector d
Hi, group.
I thought that if you use a Switch, e.g. 2924XL, each port gives you
dedicated line, and if you use a Hub all ports share the bandwidth. However
while playing with SnifferPro I can see all the traffic on the pure IP
network, including IPX/SAP, whereas if I connect Sniffer to a FastHub40
Eric,
Thanks for the reply.
I still have to sort out the sniffer capture i did last night. But i think
you're likely on the right track here. I'll keep you informed.
Elmer Deloso
_
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.ht
Hello, gang.
I'd like to know if anyone has seen this behaviour of a 4505 (v.11.2) where
it is able to handle heavy traffic throughout the day with no more than a
50% cpu utilisation max but shows a few periods of spikes up to 98% when
there is no WAN traffic say 4am or 9pm. These spikes show up a
I apologise for not being specific. I did not use the MRTG output as a
measure of CPU utilisation, but rather to alert me when the spike in traffic
occurs and then look into the CLI for the % CPU utilisation. I'm hoping it's
not a scheduled ICMP barrage coming from the inside, but I'll find out so
Hello, group.
Can someone give me feedback on implementing IP Accounting on the gateway
router? I'd like to know it's plus / minus sides, cpu/memory load issues,
etc. CCO doesn't seem to have much info on it. Thanks in advance.
Elmer Deloso
_
FAQ, list archives, a
Title: RE: Some Great Cisco BGP Links
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/n
p1_c/1cbgp.htm
http://www.cisco.com/warp/customer/459/21.html
http://www.cisco.com/warp/customer/459/22.html
http://www.cisco.com/cpress/cc/td/doc/cisintwk/ics/icsbgp4.htm
Title: Cisco links
Group,
I hope these links provide answers to questions still banging on many heads
like mine when reviewing for these exams. From Vo-IP to SRB, etc.
Elmer
http://www.cisco.com/univercd/cc/td/doc/product/software/ios113ed/113ed_cr/np1_c/
http://www.cisco.com/univercd/cc/td/
Title: RE: Token Ring Network Reference - SC30-3374-02
Try this link.
http://www.networking.ibm.com/tra/whitepapers/TR00-3.htm
HTH,
Elmer
Title: SmartCertify CBT software for study
Don't
believe the salesman. If I had to do it again I wouldn't waste
my
money
on CBT. I've used their MCSE and ICRC products and I think
it's
a
waste of time and money. Dealing with them is like buying from a used car
salesman ( my personal experi
Title: Access-list and switching
Hi, group.
Is there a way to implement access-list type of security on Catalyst 2924?
I know that to do Layer -3 switching will need at least the 4000 series.
Short of implementing a VLAN, is there a way I can tell the port or switch to allow only certain IP ad
Hi,Group.
I have been searching for sample configurations on InterVLAN routing without
using ISL (bec. I don't have a FE interface) and I could not find any on
CCO.
My questions then are:
1. Is my only option then to use subinterfaces on the Ethernet port on the
"Router-on-a-stick" design? Meani
Hi.
I've done some research into this setup and the dollar figures. First of
all, the books indicate you can do direct ATM router-to-ATM router without
any switch in between. But even a 4500-M ATM module costs around $4275.
I'm referring to the NM-1A-T3 which is a DS-3. If you know of a cheaper
pr
Ejay,
The 1924's are not modular, and they sell on e-bay for as low as $450.
I just picked up a 2912XL-EN for $650. All 12 ports are 10/100, and it
has a faster CPU.
HTH.
Elmer Deloso
-Original Message-
From: Hire, Ejay [mailto:[EMAIL PROTECTED]]
Sent: Friday, April 27, 2001 9:58 AM
To:
DOS in a Windows environment would use "netstat -a".
I think you need a TCP Client plugin to get this same functionality in a
pure DOS environment.
Elmer
-Original Message-
From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 01, 2001 5:39 PM
To: [EMAIL PROTECTED]
Sub
I learned a few weeks ago that Wendell Odom is one of the 5 CCIE's working
for www.skylinecomputer.com. One of these 5 gentlemen is a double CCIE. They
might have more by now. They also have a training centre in Reno, NV.
Elmer
-Original Message-
From: William E. Gragido [mailto:[EMAIL P
Phil,
If this is the case, please explain then why i was able to upgrade my 2516
from a 10.2 to 12.1(8) when there were no boot rom chips on the board? The
two 1/2-inch squares were empty. Yet the sh ver says it has IGS-RXBOOT
something. Am i missing someting here? I did put 16F-16D in it. But I r
hi, all.
i'm trying to upgrade a 16Mb FLASH in my 2516, but either the RouterSoftware
Loader or doing copy tftp flash can't erase the existing Flash code.
Here's what I get...
Router(boot)#copy tftp flash
System flash directory:
No files in System flash
[0 bytes used, 16777216 available, 16777216
I just started putting together my lab which consists of
4500 - 4 port serial, 2 Ether
4500 - 2 port serial, 2 Ether, 1 TR
2503
2504
2514
2516
I based this on the interface requirements to follow allong Stephen Hutnik's
CCIE Lab Study Guide.
All 2500's are ver.12 series, 4500's are 11.3.
OC-3 Sin
Phil,
I'm a novice when it comes to ATM, so does it mean I won't be able to
practice PVC's if I just connect the two ATM interfaces on my 4500
back-to-back? What would I be able to do or not do if I don't have an ATM
switch in between the routers?
Unfortunately, the ATM book by CiscoPress has all
Hi, all.
Does anybody know the name of the company that wrote the "Examine" protocol
analyser featured in Jeff Doyle's Routing TCP/IP Vol.1?
Thanks.
Elmer
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=5241&t=5241
--
FAQ, list
Hi, everyone.
I've just installed a single-mode ATM module on each of my 4500's, both
routers recognize the card. I configure them as shown below, however I can't
ping even the local ATM interface even though it shows as being up. I also
icluded the debug output. Please tell me what's not right. T
Based on 3 people that have so far concurred on using subinterfaces before
you can ping, it seems that Hutnik's first Lab exercise in the ATM chapter
is technically wrong. If I can prove this I will certainly send him an
e-mail to clear up the issue.
I'll try this tonight and post the working conf
s are more sane and yes I can ping, from both routers to the
other router.
So, the lab is correct BUT they forgot the little thing about the clock if
you're directly back-to-back. Plugged them both back into the LS-1010, took
the clock off and things are back to normal.
Nice little diversion
I just got 6 b2b serials from Robert Lowery for $24.
I prefer these over the others because they're only 3 ft
long and costs less than half the regular b2b cables. Not only that but
they're a lot lighter too. Perfect for home
lab setup. His e-mail is [EMAIL PROTECTED]
Elmer
-Original Message--
TED]]
Sent: Wednesday, May 30, 2001 6:14 PM
To: Deloso, Elmer G (WPNSTA Yorktown)
Subject: Re: Back to back Serial for Cisco 2621 [7:6497]
I'm assuming that was $24 each?
-e-
- Original Message -
From: "Deloso, Elmer G (WPNSTA Yorktown)"
To:
Sent: Wednesday, May 30, 2001
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