cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements
Walkthrough Wednesdays
1324
Views
5
Helpful
2
Replies

Spoofing on a ISDN T1 Router

                   On one of our Cisco 2921 Routers we have a Serial Interface with a PRI T1 from a Telco that is showing the following:

     Serial0/1/1:23 is up, line protocol is up (spoofing)

                    This does not seem like a issue, but I would like to know if anyone has seen this before and if it should be active on the interface 24/7. We were told that this would be on that interface at all times. To my understanding, Spoofing is a layer 2 problem and not a 'ok thing'. Please help.

1 ACCEPTED SOLUTION

Accepted Solutions
acampbell
Advocate

William,

Spoofing on the ISDN T1 just indicates that the interface has presented itself the IOS and is operational.

Worry when you dont see spoofing.

Regards,
Alex.
Please rate useful posts.

Regards, Alex. Please rate useful posts.

View solution in original post

2 REPLIES 2
acampbell
Advocate

William,

Spoofing on the ISDN T1 just indicates that the interface has presented itself the IOS and is operational.

Worry when you dont see spoofing.

Regards,
Alex.
Please rate useful posts.

Regards, Alex. Please rate useful posts.

View solution in original post

Makes sense now. Thank you.

Content for Community-Ad

Spotlight Awards 2021