Mailing List Archive

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Terry:

Are you still having issues with this device or did you figure it
out?

==DMT>

- ----SIGNAURE-------
Douglas M. Todd, Jr.
CCNA, CCNP, CIT
Network Engineering
Partners Health Care
Building 149
149 13 Street
Charlestown, MA 02129-200
Tel: 617.726.1403
Email: dtodd@partners.org
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https://digitalid.verisign.com/services/client/index.html
- -----Original Message-----
From: Terry Brown [mailto:telbrown@btinternet.com]
Sent: Tuesday, July 30, 2002 9:55 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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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