From: Anthony Pace (anthonypace@xxxxxxxxxxx)
Date: Fri Jul 19 2002 - 19:54:56 GMT-3
Greg,
is this a fair statement then:
IF you have no layer three address on the interfaces in a bridge group,
and you enable IRB and create a BVI you are by default :
bridgeing on all protocoles but IP for that bridge group, but no
routeing via the BVI is enabled untill you enter: "bridge xx route xxx"
For IP you would have to enter "bridge xx bridge IP" manually, but the
BVI funcionality would be automatic?
I have just gotten in the habit of manually entering the bridge, no
bridge, route, no route commands nmanually just to be safe.
Anthony Pace
On Fri, 19 Jul 2002 18:47:09 -0400, "Greg Schmitt"
<gschmitt@thrupoint.net> said:
> Greetings,
>
> The BVI provides a virtual "interface" to which traffic on "bridged"
> segment can be forwarded. From this "interface", the formerly
> "bridged" traffic can then "routed" out an actual interface that is
> participating in a routed segment.
>
> Prior to IRB (with its BVI), you could route and bridge on a single
> router using CRB. However, bridged and routed traffic could
> never be mixed. IRB/BVI allows you to mix bridged and routed segments
> on the same platform.
>
> There's a good discussion on this in 'Cisco Certification Bridges,
> Routers and Switches for CCIEs' by Caslow.
>
> Cheers,
>
> Greg
>
> Greg Schmitt, CCIE #8105
>
> Internetwork Solutions Engineer
> ThruPoint, Inc.
> Cell: 443-822-5183
> IM: GregThruPoint
> email: GSchmitt@thrupoint.net
>
>
>
> -----Original Message-----
> From: Anthony Pace [mailto:anthonypace@fastmail.fm]
> Sent: Friday, July 19, 2002 6:22 PM
> To: gschmitt@thrupoint.net; Diment, Andrew; 'Rich Kleimon';
> ccielab@groupstudy.com
> Subject: RE: BVI Problem
>
>
> Greg,
>
> What purpose does the BVI serve other than to provide layer 3
> connectivity to a group of bridged interfaces?
>
> Anthony Pace
>
>
>
> On Fri, 19 Jul 2002 18:11:31 -0400, "Greg Schmitt"
> <gschmitt@thrupoint.net> said:
> > Greetings,
> >
> > One thing to remember on BVI, all protocols except IP are bridged by
> > default. IP is routed by default.
> >
> > Cheers,
> >
> > Greg
> >
> > Greg Schmitt, CCIE #8105
> >
> > Internetwork Solutions Engineer
> > ThruPoint, Inc.
> > Cell: 443-822-5183
> > IM: GregThruPoint
> > email: GSchmitt@thrupoint.net
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Anthony Pace
> > Sent: Friday, July 19, 2002 5:46 PM
> > To: Diment, Andrew; 'Rich Kleimon'; ccielab@groupstudy.com
> > Subject: RE: BVI Problem
> >
> >
> > I noticed the same thing as Andy. I think that "bridge 1 bridge ipx" is
> > a default and does not display but it allows the IPX traffic to be
> > bridged on all the interfaces in Bridge group 1. In order to get the
> > BVI connectivity into the BRIDGE-GROUP, you need "bridge 1 route ipx".
> >
> > These two commands are "per protocole being bridged or routed. Routed,
> > means that the BVI will provide a layer 3 address for the whole
> > broadcast domain which is the briged interfaces.
> >
> > The bridge, no bridge, route, no route commands seem to be auto
> > generated, depending on the order you do things. (Bridge-group, BVI,
> > putting interfaces in the bridge group) and depending if you allready
> > had layer 3 interfaces for a particular protocole on a particular
> > interface.
> >
> > Also; isn't it necessary to disable the IPX reserved netwok of FFFFFFE
> > if you want to actually use it fot your LAN?
> >
> > Anthony Pace
> >
> >
> > On Fri, 19 Jul 2002 15:38:19 -0500, "Diment, Andrew"
> > <adiment@qwest.com> said:
> > > I assume you are saying it's not passing IP because there is no "bridge
> > > 1
> > > route ipx". This should work. Looking at the "show ver" I notice the
> > > router has been up for 2 days. Did you try to reboot the router? I
> > > have
> > > found if you are making changed and it looks like it should work but
> > > doesn't
> > > a reboot will usually fix it.
> > >
> > > Andy
> > >
> > > -----Original Message-----
> > > From: Rich Kleimon [mailto:richard_kleimon@qwest.net]
> > > Sent: Friday, July 19, 2002 1:37 PM
> > > To: ccielab@groupstudy.com
> > > Subject: BVI Problem
> > >
> > >
> > > Having trouble with a BVI. I know this should work because I have done
> > > it on
> > > different equip.. It doesn't pass any traffic.
> > > Any thoughts?
> > >
> > > bridge irb
> > >
> > > interface FastEthernet1/0
> > > no ip address
> > > no ip directed-broadcast
> > > full-duplex
> > > !
> > > interface FastEthernet1/0.10
> > > encapsulation isl 10
> > > ip address 135.6.32.6 255.255.255.0
> > > no ip redirects
> > > no ip directed-broadcast
> > > ipx encapsulation NOVELL-ETHER
> > > ipx network 56
> > > !
> > > interface FastEthernet1/0.20
> > > encapsulation isl 20
> > > no ip redirects
> > > no ip directed-broadcast
> > > bridge-group 1
> > > !
> > > interface FastEthernet1/0.40
> > > encapsulation isl 40
> > > no ip redirects
> > > no ip directed-broadcast
> > > bridge-group 1
> > > !
> > > interface BVI1
> > > ip address 135.6.33.6 255.255.255.0
> > > no ip directed-broadcast
> > > ipx network FFFFFFFE
> > >
> > > bridge 1 protocol ieee
> > > bridge 1 route ip
> > >
> > >
> > > R6#sh ver
> > > Cisco Internetwork Operating System Software
> > > IOS (tm) C2600 Software (C2600-JS-M), Version 12.0(21a), RELEASE
> > > SOFTWARE
> > > (fc1)
> > > Copyright (c) 1986-2002 by cisco Systems, Inc.
> > > Compiled Sat 02-Feb-02 00:58 by nmasa
> > > Image text-base: 0x80008088, data-base: 0x80B1D42C
> > >
> > > ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
> > >
> > > R6 uptime is 2 days, 4 hours, 27 minutes
> > > System restarted by power-on
> > > System image file is "flash:c2600-js-mz.120-21a.bin"
> > >
> > > cisco 2610 (MPC860) processor (revision 0x202) with 29696K/3072K bytes
> > > of
> > > memory.
> > > Processor board ID JAD04011VDX (943008882)
> > > M860 processor: part number 0, mask 49
> > > Bridging software.
> > > X.25 software, Version 3.0.0.
> > > SuperLAT software (copyright 1990 by Meridian Technology Corp).
> > > TN3270 Emulation software.
> > > 1 Ethernet/IEEE 802.3 interface(s)
> > > 1 FastEthernet/IEEE 802.3 interface(s)
> > > 1 Serial network interface(s)
> > > 2 Serial(sync/async) network interface(s)
> > > 32K bytes of non-volatile configuration memory.
> > > 8192K bytes of processor board System flash (Read/Write)
> > >
> > > Configuration register is 0x2102
> > >
> > >
> > > Console> (enable) sh port 1/2
> > > Port Name Status Vlan Level Duplex Speed Type
> > > ----- ------------------ ---------- ---------- ------ ------ -----
> > > ------------
> > > 1/2 connected trunk normal full 100
> > > 100BaseTX
> > >
> > > Port Security Secure-Src-Addr Last-Src-Addr Shutdown Trap
> > > IfIndex
> > > ----- -------- ----------------- ----------------- -------- --------
> > > -------
> > > 1/2 disabled No disabled 4
> > >
> > > Port Broadcast-Limit Broadcast-Drop
> > > -------- --------------- --------------
> > > 1/2 - -
> > >
> > > Port Status Channel Channel Neighbor
> > > Neighbor
> > > mode status device port
> > > ----- ---------- --------- ----------- -------------------------
> > > ----------
> > > 1/2 connected auto not channel
> > >
> > > Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize
> > > ----- ---------- ---------- ---------- ---------- ---------
> > > 1/2 8 13 0 21 0
> > >
> > > Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts
> > > Giants
> > > ----- ---------- ---------- ---------- ---------- --------- ---------
> > > ---------
> > > 1/2 1 0 0 0 0 2
> > > -
> > >
> > > Last-Time-Cleared
> > > --------------------------
> > > Sat Jul 6 2002, 18:27:39
> > >
> > > Console> (enable) sh ver
> > > WS-C5000 Software, Version McpSW: 4.5(13a) NmpSW: 4.5(13a)
> > > Copyright (c) 1995-2002 by Cisco Systems
> > > NMP S/W compiled on Feb 4 2002, 16:46:59
> > > MCP S/W compiled on Feb 04 2002, 16:48:19
> > >
> > > System Bootstrap Version: 2.4(1)
> > >
> > > Hardware Version: 2.1 Model: WS-C5000 Serial #: 007408581
> > >
> > > Mod Port Model Serial # Versions
> > > --- ---- ---------- --------- ----------------------------------------
> > > 1 2 WS-X5509 007408581 Hw : 2.1
> > > Fw : 2.4(1)
> > > Fw1: 2.4(1)
> > > Sw : 4.5(13a)
> > > 2 12 WS-X5213A 005150972 Hw : 1.1
> > > Fw : 1.4
> > > Sw : 4.5(13a)
> > >
> > > DRAM FLASH NVRAM
> > > Module Total Used Free Total Used Free Total Used Free
> > > ------ ------- ------- ------- ------- ------- ------- ----- -----
> > > -----
> > > 1 16384K 10163K 6221K 8192K 3840K 4352K 256K 113K
> > > 143K
> > >
> > > Uptime is 12 days, 17 hours, 35 minutes
> > > Console> (enable)
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