From: Murphy, William (William.Murphy@uth.tmc.edu)
Date: Sat Mar 01 2008 - 13:05:55 ARST
I know on my 6500 Sup7203B's with 12.2(18)SXF you can configure
sub-interfaces... Not sure if other Cisco switches support this or
not...
PE2#show version | include 33_rp
IOS (tm) s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version
12.2(18)SXF12, RELEASE SOFTWARE (fc2)
BOOTLDR: s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version
12.2(18)SXF12, RELEASE SOFTWARE (fc2)
PE2#show ip interface brief | exclude unass
Interface IP-Address OK? Method Status
Protocol
GigabitEthernet4/48.10 10.255.1.254 YES manual up
up
GigabitEthernet4/48.20 139.52.1.254 YES manual up
up
GigabitEthernet4/48.30 139.52.5.254 YES manual up
up
GigabitEthernet4/48.40 139.52.9.254 YES manual up
up
GigabitEthernet4/48.50 129.106.10.254 YES manual up
up
GigabitEthernet4/48.100 10.3.253.254 YES manual up
up
GigabitEthernet4/48.500 129.106.155.254 YES manual up
up
Another difference between interfaces and SVI's is auto-state... The
switch brings the SVI up or down based on the state of other ports
belonging to the same VLAN. If there are no ports in the VLAN that are
up then auto-state brings the SVI down...
Bill Murphy
Senior Network Analyst
University of Texas Health Science Center - Houston
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
prateek reddy
Sent: Saturday, March 01, 2008 4:34 AM
To: shady darwish
Cc: Cisco certification
Subject: Re: switches layer 3 Question
A routed port is the physical port that acts similar to that of port
on the router. It is configured with the layer 3 address ( IP ADDRESS
) and works at the Network layer. So it will not be under any VLAN.
And one more important thing we have to consider is unlike port on
router, we can't configure sub interfaces on the routed ports of the
Layer 3 Switch.
SVIs are the virtual layer 3 interfaces that can be configured on
multi layer switches. We use SVIs for Inter-VLAN routing. A SVI can be
associated with a single VLAN and for that VLAN we configure IP
Address of the same subnet and that IP address will be the default
gateway of the workstations in the VLAN.
The main advantage with the SVIs over routed ports is we can have
redundancy in SVIs by using more than one link under a VLAN as we will
be assinging IP Address for the VLAN in SVIs.
Cheers,
Prateek.
On 3/1/08, shady darwish <engshad.shady@gmail.com> wrote:
> need to know differences between routed port and svi ..in the way for
> connectivity and routing
>
>
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