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Figure 29 Layer 2 Prot ocol Tunnel Screen
The following t able describes t he fields in t his screen.
Table 22 Layer 2 Prot ocol Tunnel Screen
LABEL
Port
*
CDP
STP
VTP
Point t o Point
PAGP
LACP
UDLD
6.7 Bandwidth Control
This sect ion shows you how you can cap t he m axim um bandwidt h using t he Ba ndw idt h Cont r ol
screen.
Bandwidt h cont rol m eans defining a m axim um allowable bandwidt h for incom ing and/ or out- going
t raffic flows on a port .
Chapter 6 Advanced Application Configurations
DESCRIPTION
This field displays t he port num ber.
Use t his row t o m ake t he set t ing t he sam e for all port s. Use t his row first and t hen
m ake adj ust m ent s on a port- by- port basis.
Note: Changes in this row are copied to all the ports as soon as you make them.
Select t his opt ion t o have t he Swit ch t unnel CDP ( Cisco Discovery Prot ocol) packet s so
t hat ot her Cisco devices can be discovered t hrough t he service provider 's net work.
Select t his opt ion t o have t he Swit ch t unnel STP ( Spanning Tree Prot ocol) packet s so
t hat STP can run properly across t he service provider 's net work and spanning t rees
can be set up based on bridge inform at ion from all ( local and rem ot e) net works.
Select t his opt ion t o have t he Swit ch t unnel VTP ( VLAN Trunking Prot ocol) packet s so
t hat all cust om er swit ches can use consist ent VLAN configurat ion t hrough t he service
provider 's net work.
The Swit ch support s PAgP ( Port Aggregat ion Prot ocol) , LACP ( Link Aggregat ion Cont rol
Prot ocol) and UDLD ( UniDirect ional Link Det ect ion) t unneling for a point- t o- point
t opology.
Bot h PAgP and UDLD are Cisco's propriet ary dat a link layer prot ocols. PAgP is sim ilar
t o LACP and used t o set up a logical aggregat ion of Et hernet port s aut om at ically. UDLD
is t o det erm ine t he link's physical st at us and det ect a unidirect ional link.
Select t his opt ion t o have t he Swit ch send PAgP packet s t o a peer t o aut om at ically
negot iat e and build a logical port aggregat ion.
Select t his opt ion t o have t he Swit ch send LACP packet s t o a peer t o dynam ically
creat es and m anages t runk groups.
Select t his opt ion t o have t he Swit ch send UDLD packet s t o a peer 's port it connect ed
t o m onit or t he physical st at us of a link.
MGS3750-28F User's Guide
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