From: marvin greenlee (marvin@ccbootcamp.com)
Date: Thu Apr 07 2005 - 17:33:55 GMT-3
VRRP is very similar to HSRP, in that you have an elected virtual router
that forwards packets sent to a virtual IP address.
With DHCP, you have the option of specifying multiple gateways, but it is up
to the end hosts to determine whether a gateway has failed, and to switch to
using the next gateway.
IRDP announces a gateway. By itself, it is not recommended for failure
detection, due to the spacing between advertisements. IRDP can be used in
conjunction with VRRP, and can advertise the IP address of the virtual
address, by setting a priority value.
GLBP is similar to VRRP and HSRP, but multiple routers are active and the
packet forwarding is balanced.
IRDP - RFC 1256
http://www.faqs.org/rfcs/rfc1256.html
VRRP - RFC 3768
http://www.faqs.org/rfcs/rfc3768.html
Cisco - GLBP - Gateway Load Balancing Protocol -
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guid
e09186a00801541c8.html
Marvin Greenlee, CCIE#12237, CCSI# 30483
Network Learning Inc
marvin@ccbootcamp.com
www.ccbootcamp.com (Cisco Training)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of mani
poopal
Sent: Thursday, April 07, 2005 1:08 PM
To: ccielab@groupstudy.com
Subject: vrrp vs irdp [bcc][faked-from][bayes]
Importance: Low
Hi Guys,
I have a question regarding gateway redundency. If R1 & R3 are connected by
ethernet link(vlan 10) and R3 is the dhcp server. We have to make R1 as a
primary link and R1 as gateway when only primary fails(Restriction:Not to
use hsrp feature)
R1-----VLAN 10 USERS--------R3(DHCP SERVER)
If a question does not ask to track and interfaces and not telling any thing
about irdp asware status of clients. What feature can be used(vrrp or
irdp). Any help is appreciated with good example.
PS:what is the difference between vrrp and irdp and under what circumstenses
we use these features.
thanks
Mani
B.ENG,A+,CCNA,CCNP,CCNP-VOICE, CSS1,CNA,MCSE
(416)431 9929
MANI_CCIE@YAHOO.COM
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