TCPmag.com
http://tcpmag.com/
http://tcpmag.com/rss
June 26, 2007
Editor: Gladys Rama (grama 1105media.com)
------------------------------------------------------------
------------
THIS ISSUE SPONSORED BY:
- Save Up to 12% on Total Cisco & Microsoft Purchases at
D&H
http://in
fo.101com.com/default.asp?id=39534
- Cisco Press books for CCNA 640-802 available in July
http://in
fo.101com.com/default.asp?id=40118
- Out-of-Band Management: Market Assessment
http://in
fo.101com.com/default.asp?id=39861
------------------------------------------------------------
------------
IN THIS ISSUE OF TCPmag.com:
1. Q&A: Troubleshooting HSRP
2. What's New on TCPmag.com
3. Interesting Employment in Oklahoma, Texas, California
************************************************************
************
SPONSOR: Save Up to 12% on Total Cisco & Microsoft
Purchases at D&H
************************************************************
************
Did you know there are over 7 million small businesses using
PCs
without a true server-based network? Learn how to turn that
statistic
into profits with D&H's SMB Step Up the Network Program.
Experience
true step-by-step network configurations using products
exclusivly
offered by Cisco & Microsoft.
See it in action at:
http://i
nfo.101com.com/default.aspx?id=39534
************************************************************
************
1. Q&A: Troubleshooting HSRP
Send your toughest Cisco technical questions to editortcpmag.com
with the subject line "Attn: Scott."
Scott,
I have two HSRP-enabled routers in Chicago and two
HSRP-enabled
routers in the neighboring suburb of Wood Dale connected by
point-to-point T1 links. My problem is when the active line
goes
down, the standby does not automatically take over the role
of
active router. I have to manually change the priority on the
standby
routers in Chicago and Wood Dale for traffic to flow.
Here are my router configuration files in attachments...
-- Scott
------------------------------
Donald,
Well, without giving too much of your configuration
information away
to the rest of the world, I think that your problem lies in
the idea
that your physical interface (which you're tracking) is
still
considered "up," even though you may lose routing
or functional
connectivity along the way.
Debugs may help look at the specific information there, but
we can
look at different ways of tracking between them to perhaps
give more
accurate listings. Your configuration, as far as managing
the
priority levels and looking at your use of "standby
preempt," looks
very good.
Boiling that idea down, there aren't too many reasons for
HSRP not
to work properly. So take a look at a route learned over
that
serial interface that you're using. Any route (non-static)
is fine,
but what's most important is one that you've seen disappear
when
you're having problems and need to manually change
priorities.
If you don't know which route to use, you can always try to
look at
"debug IP routing" and see what changes when
there's a problem. Like
most debugs, we try to be very careful when using them on
live
production equipment. Hopefully, though, your routing table
shouldn't
be changing that much on a consistent or ongoing basis, so
it should
be OK.
As a side note, if you DO see lots of changes in your
routing table,
your IGP may be the issue and not necessarily the link
between sites.
At least it'll target your troubleshooting!
Back to tracking. Ever since 12.2T IOS, we've added the
ability to
track other things like IP routes, IP route metrics and
interface
line protocol functionality. In later releases, we've added
things
like SLA monitoring or latency issues. We went into some
detail on
this in a Q&A article a little while ago:
http://tcpmag.com/qanda/article.asp?editorialsid=378
Once you pick a learned route -- let's say 10.10.10.0/24 --
we can
track on it for either of your routers performing HSRP.
These will
be global commands to set things up:
Track 1 ip route 10.10.10.0/24 reachability
Then change how your HSRP configuration is set on your
interfaces:
Int fa0/0
No standby track Serial0/0
Standby track 1
If you're using only static routes, you may consider looking
at
interface line protocol instead of the full interface (which
requires
down/down to trigger the failover). Just change our tracking
object globally:
Track 1 interface serial0/0 line-protocol
Or
Track 1 interface serial0/0 ip routing
Try these and see if your HSRP starts behaving the way you
want it
to work. If you continue to have problems, look at the
output from
"debug standby events" and see if any information
there is helpful
to you.
Hope that helps,
-- Scott
Scott Morris, quadruple CCIE, JNCIE and all-around
Uber-Geek, can often
be seen traveling around the world consulting and delivering
CCIE
training. He has recently stepped up as VP of Curriculum
Development
for IPexpert and will oversee a new consulting practice. For
more
information on him check out http://www.ipexpert.com.
Send your questions for this column to editortcpmag.com
with the subject line "Attn: Scott."
Miss a Q&A? Go online to http://tcpmag.com/qanda/
To comment on this Q&A, go to:
http://tcpmag.com/qanda/article.asp?editorialsid=382
************************************************************
************
SPONSOR: Cisco Press books available in July for CCNA
640-802
************************************************************
************
Cisco has announced the all-new CCNA 640-802 and CCENT
640-822 exams,
and Cisco Press is ready with new products. Available
starting in late
July, these products will include a new version of the
best-selling
CCNA Official Exam Certification Library, plus the all-new
CCNA Quick
Reference Sheets.
Visit http://i
nfo.101com.com/default.aspx?id=40118 for more info.
************************************************************
************
2. What's New on TCPmag.com
NEWS: "Cisco Revamps CCNA, Launches New Entry-Level
Cert"
Cisco Systems announced yesterday that it will release a new
version
of its Cisco Certified Network Associate (CCNA)
certification on
Aug. 1, along with a brand-new entry-level title, the Cisco
Certified
Entry Networking Technician (CCENT).
http://tcpmag.com/news/article.asp?editorialsid=1233
NEWS: "Cisco's IronPort Fait Accompli"
Cisco Systems Inc. last week closed its acquisition of the
former
IronPort Systems Inc. with a bang, touting a new
Self-Defending
Network vision that incorporates protection into its core
routing and
switching portfolio, as well as applications and content.
http://tcpmag.com/news/article.asp?editorialsid=1231
NEWS: "Customers Like SSL VPNs for Ease of Use, IPSec
for Security"
So which are better, SSL or IPSec VPNs? The answer, not
surprisingly,
depends on what you mean by the word "better":
customers tend to like
SSL VPNs for ease of use, although IPSec VPNs get top marks
for security.
http://tcpmag.com/news/article.asp?editorialsid=1232
RSS FEEDS ON TCPMAG.COM
If you're running an RSS client, then consider signing up
for feeds
from TCPmag.com. You'll automatically be notified when new
content
is posted. Learn more here: http://tcpmag.com/rss/
------------------------------------------------------------
------------
3. Interesting Employment in Oklahoma, Texas, California
Job postings courtesy of Monster.com.
AMERICAN CANCER SOCIETY, NETWORK ENGINEER
Position Type: Full time
Location: Oklahoma City, Okla.
Salary: Not specified
Experience: At least 5 years
Desired Education: Associate's degree, CCNA
The network engineer will support the American Cancer
Society's entire
network and network components. Responsibilities include
monitoring
network security, developing and maintaining security
policies, and
managing WAN and firewall configuration. Experience with
firewalls,
Cisco technologies and Microsoft servers required.
To learn more, visit:
http://jobview.monster.com/getjob.asp?JobID=59304243
-----------------------------
THE HOME DEPOT, SENIOR NETWORK ENGINEER - LAYER 3, FIREWALL,
LOAD BALANCING
Position Type: Full time
Location: Austin, Texas
Salary: Not specified
Experience: At least 7 years
Desired Education: Associate's or bachelor's degree, CCNA,
CCNP
Responsibilites include monitoring network performance,
recommending
hardware and software implementations, maintaining
documentation, and
developing an interruption-recovery plan for the network.
Must have
experience working with firewalls, LAN/WAN, DNS, Layer 3
routing
protocols, and Cisco routing and switching. On-call
availability
may be required.
To learn more, visit:
http://jobview.monster.com/getjob.asp?JobID=59266477
-----------------------------
MEADE INSTRUMENTS, SENIOR NETWORK ADMINISTRATOR
Position Type: Full time
Location: Irvine, Calif.
Salary: Not specified
Experience: 5 to 7 years
Desired Education: Bachelor's degree, CCNA, CCNP
The senior network administrator will be responsible for the
company's
LAN technologies (wired and wireless) and Windows servers.
Additional
duties include monitoring server performance and
recommending upgrades
and improvements. Experience with Veritas backup software,
Active
Directory and Windows server administration required.
To learn more, visit:
http://jobview.monster.com/getjob.asp?JobID=59256816
************************************************************
************
SPONSOR: Free Paper: Out-of-Band Management
************************************************************
************
This free report assesses the Out-of-Band (OOB) market and
the drivers
that are taking it beyond isolation and into the mainstream.
Learn how
OOB presents the broader IT management market with a
remarkable
building block for achieving greater control, resiliency,
and cost
efficiency by closer collaboration with in-band
technologies.
Read this free report today!
http://in
fo.101com.com/default.asp?id=39861
************************************************************
************
FREE MAGAZINE OFFERS
Subscribe now to our free monthly magazines:
NEW! Redmond Developer News magazine
https://subscribe.1105pubs.com/sub/RW?WP=NEW
FREE&TC=1&PC=MK5
Redmond Channel Partner magazine
https://subscribe.1105pubs.com/sub/RN?WP=NE
WFREE&TC=1&P=OCP01
Redmond magazine
https://subscribe.1105pubs.com/sub/MI?WP=NEWF
REE&TC=1&P=TCP
Sign up for all our related FREE newsletters today.
https://newsletters.1105pubs.com/nl/RMG.do?NL=49
00&PC=TCPNLF
Encourage your peers to excel!
Please forward this newsletter to any IT professional.
************************************************************
************
To learn how you can sponsor a future edition of this
newsletter,
contact Matt Morollo at (508) 532-1418 or
e-mail mmorollo1105media.com
Contact the editorial staff at editortcpmag.com
Newsletter problems: RED1105service.com
TCPmag.com
Redmond Media Group
16261 Laguna Canyon Road, Suite 130
Irvine, CA 92618-3608
Phone 949-265-1520
************************************************************
************
UNSUBSCRIBE OR CHANGE E-MAIL ADDRESS:
https://newsletters.1105pubs.com/nl/RMGf.do?e=nesstosharedlog.com&NL=4900
************************************************************
************
To review our Privacy Policy, visit our Web site at
http://www.1105
media.com/privacy.aspx
Copyright 2007 1105 Media Inc. TCPmag.com News may
only be redistributed in its unedited form. Written
permission
from the editor must be obtained to reprint the information
contained within this newsletter. Contact: editortcpmag.com
|
