by Here is our network. Host names are in quotes.
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"albert" "adam" "ts"
Sun clone Sun clone Terminal Server
(Solaris 2) (Solaris 2) (Bridge Co.)
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Kalpana EtherSwitch Pro16
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Fan-out Repeater
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"bertha" "betty" "cisco"
Sun Sun Cisco 2514
SunOS 4.1.x SunOS 4.1.x Router
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The problem is that the hosts on top (the Sun clones & the terminal
server) cannot connect to the other hosts, even by ping. However, the
other hosts CAN connect to the hosts on top! What happens is that the
first ping causes the bottom host to add the top host to its arp
table. I'll illustrate with an example:
pinging albert --> bertha does NOT work
bertha does NOT appear in albert's arp table
pinging bertha --> albert DOES work
bertha now appears in albert's arp table
now pinging albert --> bertha WORKS
The same thing happens between albert & the Kalpana, & between albert & adam.
Here is the configuration of the Kalpana:
all ports are in the default domain.
IP information:
the Kalpana, & all the hosts shown are on the same
subnet. All have the same subnet address (255.255.255.0).
the Kalpana's default gateway is the Cisco
the IP state is "BootP When Needed"
Telnetting to the Kalpana works (from the bottom hosts)
There are NO filters:
no filters are defined for any MAC addresses
the Port Security Mode for all ports is "Normal"
The switching mode for all ports is default:
Auto Switching Mode
50% Error Water Mark
Runt-free Mode off
At first, the Kalpana did NOT participate in the Spanning Tree
Algorithm. At someone's suggestion, I had it participate. It did not
help. Here is the configuration for that:
Participate in Spanning Tree Yes
Switch Priority 0
Switch Hello Time (in Seconds) 2 (default)
Switch Maximum Message Age (in Seconds) 20 (default)
Switch Forward Delay (in Seconds) 15 (default)
the cost for all of the ports is the same (they are all the
same speed)
the priority for the port connected to the repeater is 10.
The priority for the others is default: 128
I would prefer responses by e-mail, since our site does not
necessarily receive articles from all of these newsgroups reliably. Thanks.
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Haim (Howard) Roman | Computer Center