From: Jason Chen (jchenk@xxxxxxxxxxxx)
Date: Tue Oct 05 1999 - 12:10:47 GMT-3
Hi, Everyone
Here are some tricky problems about DLSW, it's classical.
pls help me.
the ip address is:
R2 e0 137.100.2.2
R4 e0 137.100.10.1
R5 e0 137.100.6.1
Scenario 1. Config R2, R4, R5
R4 and R5 are on-demand peers. And set a filter on R4
that only frames that access NetBIOS named SERV1 can
be forwarded by the on-demand peer to R5.
My answer:
config r2 as border:
dlsw local peer 137.100.2.2 group 1 border promis
configuration of r4:
netbios access host test permit SERV1
dlsw local-peer peer-id 137.100.10.1 group 1
dlsw remote-peer 0 tcp 137.100.2.2 host-netbios-out test
dlsw peer-on-demand-defaults host-netbios-out test
configuration of r5:
dlsw local-peer peer-id 137.100.6.1 group 1
dlsw remote-peer 0 tcp 137.100.2.2
dlsw peer-on-demand-defaults
But by my configuration, the fact is R4 and R5 can't establish
peers after i set the host-netbios-out, why? and what's the correct
answer?
----------------------------
Scenario 2. Config R2, R4, R5
R2,R4 act as center router without explicit remote peers setup.
R5 prefers R2 when new circuit is setup. But R2 and R4 are
concurrent active peers of R5.
My answer:
configuration of r2:
dlsw local-peer peer-id 137.100.2.2 promiscuous
configuration of r4:
dlsw local-peer peer-id 137.100.10.1 promiscuous
configuration of r5:
dlsw local-peer peer-id 137.100.6.1
dlsw remote-peer 137.100.2.2 cost 1
dlsw remote-peer 137.100.10.1 cost 4
But the fact is , when run command "show dlsw capa" on r2 r4 and r5
the cost is 3, didn't charge, why? what's the differ between set
remote cost on r5 and set local cost on r2?
---------------------------
Scenario 3. Config R2, R4
On R2, only frames destinated to 4000:3745:0001 can bring up
the peer, after traffic inactive 5 minutes, the peer should
be down. For ease, R4 does not use explicit remote peer command
but must filter NetBIOS frames to dlsw peer.
what should i do? R2 running dynamic peer? and set an
access-expression on R4? what's the correct answer?
---------------------------
Scenario 4. Config R2, R4, R5
R2,R5 use FST encapsulation, R2,R4 use TCP encapsulation. DLSW
links Ethernet on R5, Token Rings on r4,r2. Set filter on R4 so
that name query for NetBios name SERV1 doesnot leave the ring.
Set filters on R5 so that frames destinating to FEP with the MAC
address 4000.3745.0001 are not permitted leave the Ethernet and
only that frames destinating to FEP with the MAC 4000.3745.0002
is permitted be forwarded to R2 by DLSW.
what's the correct answer?
Thanks in advance.
Best Regards
Jason Chen
Oct5th,1999
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