From: Luca Hall (lhall@setnine.com)
Date: Wed Apr 23 2008 - 11:59:30 ART
I just noticed as I sent this I had `frame-relay map ip` still
in there which is the problem... Its fixed now.
> I am trying to bridge over two multi point frame-relay interfaces:
>
> fr-mp fr-mp
> BVI1-R1 --- FRSW --- R4-BVI1
> 145.1.1.1 104 401 145.1.1.4
>
> R1
> +++++
> bridge irb
>
> interface Serial0/0.145 multipoint
> no ip route-cache
> frame-relay map bridge 104 broadcast
> frame-relay map ip 145.1.1.4 104 broadcast
> bridge-group 1
> end
>
> interface BVI1
> mac-address 00c0.1111.1111
> ip address 145.1.1.1 255.255.255.0
>
> bridge 1 protocol ieee
> bridge 1 route ip
>
> R4
> +++++
> bridge irb
>
> interface Serial0/0.145 multipoint
> no ip route-cache
> frame-relay map bridge 401 broadcast
> frame-relay map ip 145.1.1.1 401 broadcast
> bridge-group 1
>
> interface BVI1
> mac-address 00c0.4444.4444
> ip address 145.1.1.4 255.255.255.0
>
> bridge 1 protocol ieee
> bridge 1 route ip
>
> When both sides are multipoint you will never see the other sides
> MAC in a 'sh arp', so I thought that this may have something to do
> with inverse-arp since a difference is that on multipoint inverse-arp
> requests are disabled. But even with inverse-arp disabled on both sides
> and all revelant tables cleared this will still work p2p <-> mp.
> Doing a static arp mapping on either side mp <-> mp will also work.
>
> r4#sh frame map
> Serial0/0.145 (up): bridge dlci 401(0x191,0x6410), static,
> broadcast,
> CISCO, status defined, active
> Serial0/0.145 (up): ip 145.1.1.1 dlci 401(0x191,0x6410), static,
> broadcast,
> CISCO, status defined, active
> MFR0.1 (down): point-to-point dlci, dlci 45(0x2D,0x8D0), broadcast
> status defined, inactive
>
> r4#sh frame pvc | i \ ACTIVE
> DLCI = 401, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
> Serial0/0.145
>
> r4#sh ip int brief | i up
> Serial0/0 unassigned YES NVRAM up
> up
> Serial0/0.145 unassigned YES unset up
> up
> BVI1 145.1.1.4 YES NVRAM up
> up
>
> r4#sh span br
>
> Bridge group 1
> Spanning tree enabled protocol ieee
> Root ID Priority 32768
> Address 0000.0cc6.58b8
> Cost 7812
> Port 21 (Serial0/0.145)
> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
>
> Bridge ID Priority 32768
> Address 0000.0ceb.7418
> Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
> Aging Time 300
>
> Interface Designated
> Name Port ID Prio Cost Sts Cost Bridge ID
> Port ID
> -------------------- ------- ---- ----- --- ----- --------------------
> -------
> Serial0/0.145 128.21 128 7812 FWD 0 32768 0000.0cc6.58b8
> 128.17
>
> r4#sh int irb
> Serial0/0.145
>
> Routed protocols on Serial0/0.145:
> ip
>
> Bridged protocols on Serial0/0.145:
> appletalk clns decnet ip
>
> BVI1
>
> Routed protocols on BVI1:
> ip
>
> r4#ping 145.1.1.1 rep 1
>
> Type escape sequence to abort.
> Sending 2, 100-byte ICMP Echos to 145.1.1.1, timeout is 2 seconds:
>
> IP: tableid=0, s=145.1.1.4 (local), d=145.1.1.1 (Serial0/0.145), routed
> via FIB
> IP: s=145.1.1.4 (local), d=145.1.1.1 (Serial0/0.145), len 100, sending
> ICMP type=8, code=0.
>
>
> Changing either side to a point-to-point this works fine,
>
> eg.
>
> interface Serial0/0.14 point-to-point
> no ip route-cache
> frame-relay interface-dlci 104
> bridge-group 1
> end
>
> r1#ping 145.1.1.4
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 145.1.1.4, timeout is 2 seconds:
> ..!!!
> Success rate is 60 percent (3/5), round-trip min/avg/max = 36/36/36 ms
> r1#sh arp
> Protocol Address Age (min) Hardware Addr Type Interface
> Internet 145.1.1.1 - 00c0.1111.1111 ARPA BVI1
> Internet 145.1.1.4 0 00c0.4444.4444 ARPA BVI1
>
>
> So my question is why dont arp requests bridged over frame relay work
> when both sides of the link are point-to-multipoint? I know I'm just
> missing something easy about the arps, maybe bridged frames and
> eth arps vs fr inverse arps?
>
>
> Pass the CCIE in six weeks, Guaranteed!
> http://www.certscience.com/CCIE
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Pass the CCIE in six weeks, Guaranteed!
http://www.certscience.com/CCIE
This archive was generated by hypermail 2.1.4 : Thu May 01 2008 - 08:25:51 ART