[nsp] Secondary IP address not seen
Marlow, Travis
Travis.Marlow@everestgt.com
Fri, 2 Aug 2002 11:00:52 -0500
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As far as I know, this is normal behavior for secondary addresses.
-----Original Message-----
From: Terry Brown [mailto:telbrown@btinternet.com]
Sent: Tuesday, July 30, 2002 8:55 AM
To: cisco-nsp@puck.nether.net
Subject: [nsp] Secondary IP address not seen
Guys,
Can anyone offer an explanation for the following: -
I have allocated a secondary IP address to a FastEthernet interface on my
7204 router running IOS 12.1 using the following command: -
"ip address x.x.x.x x.x.x.x secondary"
[The interface is running HSRP on the primary address but not on the
secondary]
I have an IP helper on the interface to my DHCP server.
I have created an additional superscope on the DHCP server so that I can
have 500+ IP addresses on the same wire.
The problem is I cannot see the secondary IP address from the network
(cannot ping it from a client machine or even from the router itself). If I
do a show run the interface has accepted the address. If I ping the
broadcast address for the secondary subnet I get a response from all IP
addresses on both the primary and the secondary subnets. If I manually edit
a client PC with an IP address from the secondary range but use the primary
address gateway as the default then the machine can communicate over the
network., but if I allocate the default gateway as the secondary IP address
on the interface the client cannot see it??
Any ideas guys?
Regards
Tel
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<DIV><SPAN class=656150016-02082002><FONT face=Arial color=#0000ff size=2>As far
as I know, this is normal behavior for secondary addresses.</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Terry Brown
[mailto:telbrown@btinternet.com]<BR><B>Sent:</B> Tuesday, July 30, 2002 8:55
AM<BR><B>To:</B> cisco-nsp@puck.nether.net<BR><B>Subject:</B> [nsp] Secondary
IP address not seen<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Guys,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Can anyone offer an explanation for the
following: -</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have allocated a secondary IP address to a
FastEthernet interface on my 7204 router running IOS 12.1 using the following
command: -</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> "ip address x.x.x.x x.x.x.x secondary"</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>[The interface is running HSRP on the primary
address but not on the secondary]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> I have an IP helper on the interface to my
DHCP server.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have created an additional superscope on the
DHCP server so that I can have 500+ IP addresses on the same
wire.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The problem is I cannot see the secondary IP
address from the network (cannot ping it from a client machine or even
from the router itself). If I do a show run the interface has accepted the
address. If I ping the broadcast address for the secondary subnet I get a
response from all IP addresses on both the primary and the secondary subnets.
If I manually edit a client PC with an IP address from the secondary range but
use the primary address gateway as the default then the machine can
communicate over the network., but if I allocate the default gateway as the
secondary IP address on the interface the client cannot see it??</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Any ideas guys?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Tel</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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