From: Hunt Lee (ciscoforme3@yahoo.com.au)
Date: Fri Jan 03 2003 - 19:53:31 GMT-3
Hi Aidan,
Yes, that makes sense. What I was wondering, however, is that whether the command
"dlsw peer-on-demand-default tcp-queue-max" is really a requirement for setting up
"Peer-On-Demand" as Solie says, whereas I can of think that as long as you have a
DLSW Peer-Groups network setup, when a router needs a connection through a DLSW+
Border peer, a POD connection will automatically be setup.
Please correct me if I'm wrong.
Thanks.
Hunt
--- Aidan Marks <amarks@cisco.com> wrote: > A peer group/border peer is a
scalability enhancement...
>
> from the CCO docs...
>
> "Perhaps the most significant optimization in DLSw+ is a feature known as
> peer groups. Peer groups are designed to address the broadcast replication
> that occurs in a fully meshed network. When any-to-any communication is
> required (for example, for NetBIOS or Advanced Peer-to-Peer Networking
> [APPN] environments), RSRB or standard DLSw implementations require peer
> connections between every pair of routers. This setup is not only difficult
> to configure, but it results in branch access routers having to replicate
> search requests for each peer connection. This setup wastes bandwidth and
> router cycles. A better concept is to group routers into clusters and
> designate a focal router to be responsible for broadcast replication. This
> capability is included in DLSw+."
>
> and peer on demand...
>
> "A peer-on-demand peer is a non-configured remote-peer that was connected
> because of an LLC2 session established through a border peer DLSw+ network.
> On-demand peers greatly reduce the number of peers that must be configured.
> You can use on-demand peers to establish an end-to-end circuit even though
> the DLSw+ routers servicing the end systems have no specific configuration
> information about the peers. This configuration permits casual, any-to-any
> connection without the burden of configuring the connection in advance. It
> also allows any-to-any switching in large internetworks where persistent
> TCP connections would not be possible."
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fibm_c/bcfpart2/bcfdlsw.htm
>
> Make sense?
>
> Aidan
>
> At 02:51 PM 3/01/2003, Hunt Lee wrote:
>
> >Hey Tim,
> >
> >How did your testing go. Did you managed to find out what is the difference
> >between DLSW Peer Groups & Peer-on-demand? I am still very confused whether
> >there is any difference between the two.
> >
> >Thanks in advance,
> >
> >Best regards,
> >Hunt Lee
> >
> >-----Original Message-----
> >From: Ouellette, Tim [mailto:tim.ouellette@eds.com]
> >Sent: Wednesday, 1 January 2003 6:46 PM
> >To: 'Hunt Lee'
> >Cc: 'ccielab@groupstudy.com'
> >Subject: RE: Question RE: DLSW Peer Groups and Peer-On-Demand
> >
> >
> >Hunt,
> >
> >I think based on the fact that you used the promiscious that you are
> >basically doing the same as PoD.
> >
> >This is also shown in your "sh dlsw peer" for RTC
> >
> > TCP 5.5.5.5 CONNECT 523 532 pod 0 1 0
> >00:12:35
> >
> >I was wondering also if the POD and the promiscious basically did the same
> >thing but I think the promiscious just allows a connection from anywhere,
> >whereas the POD default allows a session from another router that is
> >connected to a peer of your border peer. If that makes sense. I'll try and
> >test tonight.
> >
> >Tim
> >
> >
> >-----Original Message-----
> >From: Hunt Lee [mailto:ciscoforme3@yahoo.com.au]
> >Sent: Wednesday, January 01, 2003 2:55 AM
> >To: ccielab@groupstudy.com
> >Subject: Question RE: DLSW Peer Groups and Peer-On-Demand
> >
> >
> >Hi
> >
> >Happy Holiday to all.
> >
> >I have some question that I would like to ask the group regarding DLSW Peer
> >Groups
> >and Peer-On-Demand.
> >
> >I have a home lab where the topology is as follows:
> >
> >RTA & RTC are DLSW Border Peers, while the others are DLSW Remote Peers
> >
> >SNA PU2 -- RTE ------- RTA --- RTC --- SNA PU5
> > | |
> > RTB RTD
> >
> >
> >
> >According to Solie, one needs to use "dlsw peer-on-demand-default
> >tcp-queue-max"
> >command to setup Peer-On-Demand. However, on my setup above, I didn't use
> >it at
> >all, yet I still gets the POD Peer establiahsed.
> >
> >RTC#sh dlsw peer
> >Peers: state pkts_rx pkts_tx type drops ckts TCP
> >uptime
> > TCP 1.1.1.1 CONNECT 344 342 prom 0 0 0
> >02:27:42
> > TCP 5.5.5.5 CONNECT 523 532 pod 0 1 0
> >00:12:35
> > TCP 4.4.4.4 CONNECT 312 366 prom 0 0 0
> >02:25:49
> >
> >So are DLSW Peer Groups(Border Peers) & Peer-on-Demand the SAME THING????
> >If not,
> >what is the difference, & when would one wants to use the "dlsw
> >peer-on-demand-default tcp-queue-max" command?
> >
> >Anyway, below are my partial configs:-
> >
> >RTA#sh run
> >Building configuration...
> >
> >hostname RTA
> >!
> >!
> >dlsw local-peer peer-id 1.1.1.1 group 1 border promiscuous
> >dlsw remote-peer 0 tcp 3.3.3.3
> >dlsw bridge-group 1
> >!
> >interface Loopback0
> > ip address 1.1.1.1 255.255.255.255
> >!
> >interface FastEthernet0/0
> > ip address 172.16.3.1 255.255.255.0
> > speed 10
> > half-duplex
> > bridge-group 1
> >!
> >interface Serial0/0
> > description to RTC
> > ip address 10.64.3.177 255.255.255.240
> > clockrate 64000
> >!
> >!
> >interface Serial1/2
> > description to RTB
> > ip address 10.64.3.99 255.255.255.240
> > no ip mroute-cache
> > clockrate 64000
> >!
> >interface Serial1/3
> > description to RTE
> > ip address 10.64.3.161 255.255.255.240
> > clockrate 64000
> >!
> >router eigrp 1
> > network 1.0.0.0
> > network 10.0.0.0
> > no auto-summary
> > no eigrp log-neighbor-changes
> >!
> >!
> >bridge 1 protocol ieee
> >!
> >!
> >end
> >
> >RTA#
> >
> >=====================================================
> >
> >RTB#sh run
> >Building configuration...
> >
> >hostname RTB
> >!
> >dlsw local-peer peer-id 2.2.2.2 group 1 promiscuous
> >dlsw remote-peer 0 tcp 1.1.1.1
> >dlsw bridge-group 1
> >!
> >!
> >interface Loopback0
> > ip address 2.2.2.2 255.255.255.255
> >!
> >interface Ethernet0
> > no ip address
> > bridge-group 1
> >!
> >interface Serial0
> > description to RTA
> > ip address 10.64.3.97 255.255.255.240
> > no fair-queue
> >!
> >!
> >router eigrp 1
> > network 2.0.0.0
> > network 10.0.0.0
> > no auto-summary
>
=== message truncated ===
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