Oh, and welcome to OSL : ) On Wed, Jan 13, 2010 at 10:16 PM, Joe Astorino <[email protected]>wrote:
> The author is correct. This is why when you do a "monitor session x source > vlan" the only option is rx and there is no tx or both option available. If > you want to monitor an entire VLAN you need to monitor RECEIVED traffic of > that vlan, not transmitted traffic. > > On Wed, Jan 13, 2010 at 7:37 AM, Fabio Mendes <[email protected]>wrote: > >> Hello everybody, this is my first message. :) >> >> I'd like to clarify something that is confusing me for a while. >> >> Reading through cisco documentation at: >> http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_52_se/configuration/guide/swspan.html >> >> The author says: >> >> "Only traffic that enters or leaves source ports or traffic that enters or >> leaves source VLANs can be monitored by using SPAN; *traffic routed to a >> source VLAN cannot be monitored*. For example, if incoming traffic is >> being monitored, traffic that gets routed from another VLAN to the source >> VLAN cannot be monitored; however, traffic that is received on the source >> VLAN and routed to another VLAN can be monitored." >> >> From my understanding, after the traffic is routed to a source VLAN, it >> enters the VLAN and becomes part of source VLAN's traffic. In other words, >> it is flowing on the source VLAN, so it can be monitored by SPAN/RSPAN, am I >> correct ? >> >> Why the author mentioned that, since the traffic will be monitored anyway >> ? >> >> TIA >> >> -- >> CCNA - Cisco Certified Network Associate >> CCNP - Cisco Certified Network Professional >> >> "A bird that you set free may be caught again, but a word that escapes >> your lips will not return." Jewish Proverb >> >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> > > > -- > Regards, > > Joe Astorino CCIE #24347 (R&S) > Sr. Technical Instructor - IPexpert > Mailto: [email protected] > Telephone: +1.810.326.1444 > Live Assistance, Please visit: www.ipexpert.com/chat > eFax: +1.810.454.0130 > > IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, > Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service > Provider) Certification Training with locations throughout the United > States, Europe and Australia. Be sure to check out our online communities at > www.ipexpert.com/communities and our public website at www.ipexpert.com > > > -- Regards, Joe Astorino CCIE #24347 (R&S) Sr. Technical Instructor - IPexpert Mailto: [email protected] Telephone: +1.810.326.1444 Live Assistance, Please visit: www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice, Security & Service Provider) Certification Training with locations throughout the United States, Europe and Australia. Be sure to check out our online communities at www.ipexpert.com/communities and our public website at www.ipexpert.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
