From: Krucker, Louis (louis.krucker@xxxxxxxxxxx)
Date: Sun May 26 2002 - 12:52:18 GMT-3
Hi
After deeper investigaton i found a good book who clarify this IRB/CRB
topic.
Its Cisco Lan Switching Page 523.
Heres the text.
IRB is a technique to allow a single protocoll to be both bridged and routed
on the same box.
This allowed a particular protocol such as IP to be both routed and bridged
on the same device.
It allowed all of the routed interfaces using this protocol to communicate
and all of the bridged
interfaces to communicate. However, CRB did not let routed interfaces
communicate with the
bridged interfaces. In other words, the routed and bridged worlds for the
configured protocol where
treated as two separate islands. IRB fills this gap by allowing
communication between these two islands
Regards
Louis
-----Original Message-----
From: Phil [mailto:ciscostudent1@yahoo.com.br]
Sent: Samstag, 25. Mai 2002 17:08
To: Krucker, Louis; 'Kim_W '; ''ccielab@groupstudy.com' '
Subject: RE: simple question
Louis,
With CRB, you must either bridge or route a protocol in a router, but not
both.
With IRB, you can bridge and route the same protocol in a router.
Phil
"Krucker, Louis" <louis.krucker@sunrise.net> escreveu:
Hello
What you think about this solution? I think at the end the result is the
same like yours or am i wrong?
bridge crb
int e0
bridge group 1
int e1
bridge group 1
bridge prot ieee
-----Original Message-----
From: Phil
To: Kim_W; Krucker, Louis; 'ccielab@groupstudy.com'
Sent: 25.05.2002 15:53
Subject: RE: simple question
I have to disagree, but I'll state my comment as a question as I've
never used it. Can't you configure a bridge group, let's say between e0
and e1 like this:
bridge 1 protocol ieee
int e 0
bridge-group 1
int e 1
bridge-group 1
bridge irb
bridge 1 bridge ip
This would make e0 and e1 bridge IP and all other interfaces route IP.
Now, if you want the whole router to behave as a bridge for IP you would
have to use the "no ip routing" command.
Phil
Kim_W <KIM_W@bls.gov> escreveu:
Yes, you do if you want to bridge IP.
Without it, "bridge group x" command under interfaces only
bridge nonroutable network protocols through the interfaces.
Wol
-----Original Message-----
From: Krucker, Louis [ mailto:louis.krucker@sunrise.net
<mailto:louis.krucker@sunrise.net> ]
Sent: Friday, May 24, 2002 3:19 PM
To: 'ccielab@groupstudy.com'
Subject: simple question
Hi Group
I have a simple question about bridging IP on a router.
Do i have to enter "no ip routing" to bridge IP on a router?
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