Fundamentals of MLS
269
XTAGs
Simply put, an XTAG is a unique identifier that MLS-SEs (switches) use to
keep track of the MLS-RPs in the network. All of the MAC addresses and
VLANs in use on the MLS-RP are associated to the XTAG value in the CAM
table.
The following output is from a Catalyst 6509 with an MSFC and PFC
card. The show mls command was issued to provide the output:
Switch1> (enable) sho mls
Total packets switched = 4294967295
Total Active MLS entries = 85
IP Multilayer switching aging time = 256 seconds
IP Multilayer switching fast aging time = 0 seconds,
packet
threshold = 0
IP Current flow mask is Destination flow
Active IP MLS entries = 85
Netflow Data Export version: 7
Netflow Data Export disabled
Netflow Data Export port/host is not configured.
Total packets exported = 0
IP MSFC ID Module XTAG MAC Vlans
--------------- ------ ---- ----------------- ----------
172.16.100.5 15 1 00-d0-bc-e3-70-b1 2,3
IPX Multilayer switching aging time = 256 seconds
IPX flow mask is Destination flow
IPX max hop is 0
Active IPX MLS entries = 0
IPX MSFC ID Module XTAG MAC Vlans
--------------- ------ ---- ----------------- ----------
172.16.100.5 15 1 - -
Switch1> (enable)
Copyright ©2000 SYBEX , Inc., Alameda, CA
www.sybex.com