From: Brian Short (flccnp@gmail.com)
Date: Thu Nov 15 2007 - 18:28:40 ART
They would see each others layer 2 broadcasts. Layer 3 would handle the
discrimination.
Think of putting a sniffer onto VLAN 1 with no IP assigned to the interface.
Would it record the broadcasts?
-Brian S
----- Original Message -----
From: "Sean C" <upp_and_upp@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Thursday, November 15, 2007 12:35 PM
Subject: Secondary IPs and broadcasts
> Hi Group,
>
> If I have a 3550 with Vlan 1:
>
> int vlan 1
> ip address 10.1.1.254 255.255.255.0
> ip address 10.1.2.254 255.255.255.0 secondary
>
> Interface f0/1 is in Vlan1 and has a host connected (host1) with IP
> 10.1.1.1
> /24
> Interface f0/2 is also in Vlan1 and has a host connected (host2) with IP
> 10.1.2.1 /24
>
> If host1 sends a local broadcast (10.1.1.255), will host2 receive this
> since
> both IP subnets are in the same layer 2 segment?
>
> This leads me into other areas, like what if it's an IP broadcast
> (255.255.255.255) or layer 2 broadcast (f.f.f) or if host2 is across a
> couple
> of 3550s, with each switch's SVI in both IP subnets. I'm thinking that
> host2
> will receive the frame (what host2 does with the frame is a different
> story).
> I'm just curious to see how the packets are switched.
This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:30 ART