Cisco Catalyst 3550

2-369
Catalyst 3550 Multilayer Switch Command Reference
OL-8566-01
Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
show forward
bridgeDestMap: 00000000 00000000 0000FFFF FFFFFFC7
vlanMask: 00000000 00000000 0000FFFF FFFFFE7F
portMask: 00000000 00000000 00000000 00000080
sourceMask: 00000000 00000000 00000000 00000000
globalMap: 00000000 00000000 00000000 00000000
globalMask: 00000000 00000000 0002FFFF EFFFFC03
forwMap: 00000000 00000000 00000000 00000100
frame notifies:
src u_dat vlan fl q-map
2 00 8 00 00000000 00000000 00000000 00000100
Egress q 8
signature:00000007, comparison ind:10, control info:2000941A control map:00000000
vlan:8, vlanid entry:000C0012 00000000 00000000 04620000
FastEthernet0/2 vlan 8, dst 0022.3355.9800 src 0000.1111.2222, cos 0x0, dscp 0x0
This is an example of the display that results if one of the destinations for the packet is the switch CPU.
Note that in this case the section after the frame notifies section is labeled Cpu q and that a queue name
appears:
Switch# show forward fastethernet0/1 vlan 7 0000.1111.2222 0022.3355.8800 ip 1.1.1.1
7.7.7.1 255
signature:00000007, comparison ind:11, control info:2000941A control map:00000000
vlan:7, vlanid entry:000C0011 00000000 00318C60 88000000
adjptr:0 adjacency:00000000 00000000 0000C000
vlan:7, vlanid entry:000C0011 00000000 00318C60 88000000
lookup key bk adata rawoff secoff sec
qos 960101010107070701 800000000000FF0000 0 00000000 006304 004064 4
acl 960101010107070701 800000000000FF0000 1 00000082 045408 002016 1
route 420101010107070701 000000000000000000 0 00048000 006345 000009 3
learn 186007000011112222 800E08002233558800 0 80010003 002176 002176 0
forw 186007000011112222 800E08002233558800 1 40090000 033000 000232 5
bridgeDestMap: 00000000 00000000 00000000 00000000
routeDestMap: 00000000 00000000 00100000 00000000
sourceMask: 00000000 00000000 00000000 00000000
globalMap: 00000000 00000000 00000000 00000000
globalMask: 00000000 00000000 0002FFFF EFBFFC03
forwMap: 00000000 00000000 00100000 00000000
frame notifies:
src u_dat vlan fl q-map
2 00 7 01 00000000 00000000 00100000 00000000
Cpu q:100 - routing queue
Ta b l e 2-19 show forward Output Description
Output Section Description
General (no heading)
Includes the first few lines
of the display.
Displays lookup results for several tables in the input portion of the
hardware. The output includes packet formats, the configuration of the
input VLAN, and other information.
lookup section Describes TCAM lookups performed during the input forwarding decision
and the results of these lookups.
Bitmaps and masks Displays maps and masks used to calculate the final set of forwarding
destinations.