From: Nodir Nazarov (nodir@xxxxxxxxxxxx)
Date: Tue Apr 17 2001 - 13:06:04 GMT-3
Eric,
It looks to me you are talking about half bridge. For that you have to
configure ppp encapsulation on your serial and set "ppp bridge ip" on 2500
end and just a bridge on 4k end. Remember: hdlc does not support half
bridge.
Nodir
On Tue, 17 Apr 2001, Eric Whitlock wrote:
> Did a quick test in the lab and found that turning the 4k into a bridge
> ,without any ip address and ip routing disabled, and putting an IP address
> onto the 2521's serial interface did not work. I could not ping the serial
> interface on the 2521.
>
> I configured IRB on the 2521 ,with bridging and routing enabled for IP on
> this router, removed the IP address off the serial, moved it onto the IRB
> interface and put bridging onto the serial interface. With this config I
> could ping the IRB interface from the PC(in my case it was another router).
>
> It looks like IP routing should be completely disabled on the 4000 acting as
> the bridge, otherwise it will probably try to route IP and bridge any other
> protocols. What also worked for me was to once again enable IRB on the 4000
> and use the command "bridge 1 bridge ip" - which seems to be default when
> you enable IRB.
>
> Here are the configs of the various routers, the models are not the same:
>
> Perhaps IONS would make a difference to this scenario?
>
> 4000
> ----
> version 11.2
> !
> hostname 4000
> !
> !
> ip subnet-zero
> no ip domain-lookup
> !
> interface Ethernet0
> no ip address
> bridge-group 1
> !
> interface Serial0
> no ip address
> bridge-group 1
> !
> !
> ip classless
> no logging console
> !
> bridge irb
> bridge 1 protocol ieee
> 4000#
> 4000#sh int irb
>
> Ethernet0
>
> Bridged protocols on Ethernet0:
> appletalk clns decnet ip
> vines apollo ipx xns
>
> Software MAC address filter on Ethernet0
> Hash Len Address Matches Act Type
> 0x00: 0 ffff.ffff.ffff 42 RCV Physical broadcast
> 0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree
> 0x3E: 0 00d0.58ad.4266 5 RCV Interface MAC address
> 0xC0: 0 0100.0ccc.cccc 31 RCV CDP
> 0xC2: 0 0180.c200.0000 113 RCV IEEE spanning tree
>
> Serial0
>
> Bridged protocols on Serial0:
> appletalk clns decnet ip
> vines apollo ipx xns
>
> Software MAC address filter on Serial0
> Hash Len Address Matches Act Type
> 0x00: 0 ffff.ffff.ffff 7 RCV Physical broadcast
> 0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree
> 0x3E: 0 00d0.58ad.4266 0 RCV Interface MAC address
> 0xC0: 0 0100.0ccc.cccc 0 RCV CDP
> 0xC2: 0 0180.c200.0000 0 RCV IEEE spanning tree
> 4000#
>
> 2521
> ----
>
> version 12.0
> hostname 2521
> !
> ip subnet-zero
> no ip domain-lookup
> bridge irb
> !
> interface Serial1/0
> no ip address
> no ip directed-broadcast
> no ip mroute-cache
> no fair-queue
> clockrate 2015232
> bridge-group 1
> !
> interface BVI1
> ip address 172.16.1.1 255.255.255.0
> no ip directed-broadcast
> !
> ip classless
> !
> !
> bridge 1 protocol ieee
> bridge 1 route ip
> !
> 2521#sh int irb
>
> Serial1/0
>
> Routed protocols on Serial1/0:
> ip
>
> Bridged protocols on Serial1/0:
> appletalk clns decnet ip
> vines apollo ipx xns
>
> Software MAC address filter on Serial1/0
> Hash Len Address Matches Act Type
> 0x00: 0 ffff.ffff.ffff 23 RCV Physical broadcast
> 0x0F: 0 0050.0fda.8400 0 RCV Interface MAC address
> 0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree
> 0x58: 0 0000.0cc1.f354 19 RCV Bridge-group Virtual Interface
> 0xC0: 0 0100.0ccc.cccc 0 RCV CDP
> 0xC2: 0 0180.c200.0000 0 RCV IEEE spanning tree
> 0xC2: 1 0180.c200.0000 0 RCV IBM spanning tree
>
> BVI1
>
> Routed protocols on BVI1:
> ip
>
> Hope this helps.
>
> Regards,
> Eric
>
> -----Original Message-----
> From: Chad Sullivan [mailto:chsulliv@cisco.com]
> Sent: 17 April 2001 16:45
> To: Luo Zheng; ccielab@groupstudy.com
> Subject: RE: One bridge question.
>
>
> Rest of network---2521---SER---4000---Eth---Client
>
> just assign the 4K's ser and eth in the same bridge-group.
>
> S1
> bridge-group 1
>
> E1
> bridge-group 1
>
> Bridge 1 protocol ieee
>
> You do not need to assign IP's to the 4K's interfaces (unless you would like
> to ping/telnet to it) then you can assign an IP on the PC and Ser of 2521
> within the same subnet (using the IP on the 2521 as the gateway for the PC).
> You should be able to now connect to and through the 2521.
>
> Chad Sullivan
> RTP, NC
> CCIE #6493
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Luo Zheng
> Sent: April 17, 2001 9:12 AM
> To: ccielab@groupstudy.com
> Subject: One bridge question.
>
>
> Hi, group!
>
> The case is:
> One 2521 is connected to one 4000 with serial port, and briging is enabled
> on 4000.
> One PC is connected to the ether port on 4000.
> The pc and the serial port on 2521 belong to the same ip subnet.
> I want the 4000 act as a bridge to connect the PC and 2521.
>
> How can I do with it?
> Which type of bridge can I use to complete the task??
>
> Thanks a lot.
>
> lz
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