RE: transparent bridging

From: Jonathan V Hays (jhays@jtan.com)
Date: Tue Sep 23 2003 - 15:05:13 GMT-3

Alec,

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fibm_c/bcfpart1/bcftb.htm#1002244

While concurrent routing and bridging makes it possible to both route
and bridge a specific protocol on separate interfaces within a router,
the protocol is not switched between bridged and routed interfaces.
Routed traffic is confined to the routed interfaces; bridged traffic is
confined to bridged interfaces. A specified protocol may be either
routed or bridged on a given interface, but not both.

Integrated routing and bridging makes it possible to route a specific
protocol between routed interfaces and bridge groups, or route a
specific protocol between bridge groups. Local or unroutable traffic can
be bridged among the bridged interfaces in the same bridge group, while
routable traffic can be routed to other routed interfaces or bridge
groups. 

---

I am surprised that this knowledge is no longer required to pass the R&S
Qualification exam. I guess things change....

Jonathan

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Alec
Sent: Tuesday, September 23, 2003 12:47 PM
To: ccielab@groupstudy.com
Subject: transparent bridging

Hi group,

If transparent bridging is enabled on an interface, e.g.

interface eth0
  ip address 1.1.1.1 255.255.255.0
  bridge-group 1
end

Does it mean bridging is enabled for NON-IP traffic ONLY ? while IP
traffic
will still be routed ?  'Coz I can still ping the interface address
after
applied the bridge-group in eth0.

thanks
alec

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