Management and Configuration Guide K/KA/KB.15.15

Trunk load balancing using Layer 4 ports.................................................................................159
Distributed trunking overview..................................................................................................159
Distributed trunking interconnect protocol............................................................................161
Configuring distributed trunking.........................................................................................161
About configuring peer-keepalive links.....................................................................................162
Maximum DT trunks and links supported.............................................................................163
Forwarding traffic with distributed trunking and spanning tree................................................164
Forwarding unicast traffic.............................................................................................164
Forwarding broadcast, multicast, and unknown traffic .....................................................165
IP routing and distributed trunking......................................................................................166
Distributed trunking restrictions...........................................................................................168
DT operating notes when updating software versions.................................................................169
5 Port Traffic Controls.................................................................................171
Rate-limiting.........................................................................................................................171
Configuring rate-limiting...................................................................................................171
Viewing the current rate-limit configuration..........................................................................171
Configuring ICMP rate-limiting...........................................................................................173
Viewing the current ICMP rate-limit configuration..................................................................174
Resetting the ICMP trap function of the port.........................................................................174
Determining the switch port number used in ICMP port reset commands.............................175
Configuring a broadcast limit on the switch..............................................................................175
Configuring inbound rate-limiting for broadcast and multicast traffic.......................................176
Operating Notes.........................................................................................................177
Configuring Guaranteed Minimum Bandwidth (GMB) for outbound traffic....................................177
Viewing the current GMB configuration...............................................................................179
Configuring jumbo frame operation........................................................................................181
Overview........................................................................................................................181
Viewing the current jumbo configuration..............................................................................181
Enabling or disabling jumbo traffic on a VLAN....................................................................182
Configuring a maximum frame size....................................................................................182
Configuring IP MTU..........................................................................................................183
Viewing the maximum frame size.......................................................................................183
Operating notes for maximum frame size.......................................................................183
All traffic rate-limiting............................................................................................................183
Operating notes for rate-limiting........................................................................................184
ICMP rate-limiting.................................................................................................................186
Guidelines for configuring ICMP rate-limiting.......................................................................187
Using both ICMP rate-limiting and all-traffic rate-limiting on the same interface........................188
Operating notes for ICMP rate-limiting................................................................................188
Notes on testing ICMP rate-limiting................................................................................190
ICMP rate-limiting trap and Event Log messages..............................................................190
Guaranteed minimum bandwidth (GMB).................................................................................190
GMB operation...............................................................................................................190
Impacts of QoS queue configuration on GMB operation...................................................191
Impact of QoS queue configuration on GMB commands..................................................192
Jumbo frames.......................................................................................................................192
Operating rules for jumbo frames.......................................................................................192
Operating notes for jumbo traffic-handling......................................................................193
Jumbo frame maximum size...............................................................................................194
Jumbo IP MTU.................................................................................................................194
Troubleshooting...............................................................................................................195
A VLAN is configured to allow jumbo frames, but one or more ports drops all inbound jumbo
frames.......................................................................................................................195
8 Contents