Hi,
Even I have observed this on the pix firewall which act as a default
gateway to all our switches...the switches used are catalyst 4000 series.
any explanation why it does so ?
Kind Regards /Thangavel
186K
Reading,Brkshire
Direct No -0118 9064259
Mobile No -07796292416
Post code: RG16LH
www.186k.co.uk
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but in rising every time we fall ."
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"Wilson,
Christian"
cc:
Sent by: Fax
to:
[EMAIL PROTECTED] Subject: Why do my
switches keep pinging their default
gateways!?
[7:44723]
22/05/2002
16:53
Please respond to
"Wilson,
Christian"
I have 4 2948g's in 4 different wiring closets all wired to a core 6509
through gig uplinks. The interfaces on the switches are all assigned to
VLAN 2, my management VLAN. The only way to access VLAN 2 is through a
checkpoint firewall running NG. All switches have the firewall interface
address as their default gateway. I am able to telnet to all switches and
manage them remotely just fine. I am able to ping all other subnets in my
network from the switches, routing seems fine.
My firewall logs show that all five switches are constantly pinging the
firewall interface, icmp-type 8 icmp-code 0. No one is connected to my
switches issuing a ping. These are echos, not echo-replies. When I run a
sniffer on the VLAN, I show nothing going to the swithes in the way of IP
traffic, just the echos coming from the switches. Each 2948g has about 15
2924-xl-en's attached to it through trunking. None of the 2924's are
trying
to ping the firewall, although they all have the same VLAN assignment on
their mgmt interfaces, the same default gateway, and are in the same
subnet.
There is no CGMP enabled, no DNS, no IP redirects. The icmp packets have a
TTL of 1, the sniffer reporting a TTL expired message. The icmp traffic is
constant, one every second. How can I stop this? Why is it happening?
Why
don't my 2924's ping but my 2948g's and 6509 do? Please help!
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