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Cisco Catalyst Blade Switch for HP Command Reference
OL-8916-01
Chapter 2 Cisco Catalyst Blade Switch 3020 for HP Cisco IOS Commands
traceroute mac
traceroute mac
Use the traceroute mac privileged EXEC command to display the Layer 2 path taken by the packets
from the specified source MAC address to the specified destination MAC address.
traceroute mac [interface interface-id] {source-mac-address} [interface interface-id]
{destination-mac-address} [vlan vlan-id] [detail]
Syntax Description
Defaults There is no default.
Command Modes Privileged EXEC
Command History
Usage Guidelines For Layer 2 traceroute to function properly, Cisco Discovery Protocol (CDP) must be enabled on all the
switches in the network. Do not disable CDP.
When the switch detects a device in the Layer 2 path that does not support Layer 2 traceroute, the switch
continues to send Layer 2 trace queries and lets them time out.
The maximum number of hops identified in the path is ten.
Layer 2 traceroute supports only unicast traffic. If you specify a multicast source or destination MAC
address, the physical path is not identified, and an error message appears.
The traceroute mac command output shows the Layer 2 path when the specified source and destination
addresses belong to the same VLAN. If you specify source and destination addresses that belong to
different VLANs, the Layer 2 path is not identified, and an error message appears.
If the source or destination MAC address belongs to multiple VLANs, you must specify the VLAN to
which both the source and destination MAC addresses belong. If the VLAN is not specified, the path is
not identified, and an error message appears.
The Layer 2 traceroute feature is not supported when multiple devices are attached to one port through
hubs (for example, multiple CDP neighbors are detected on a port). When more than one CDP neighbor
is detected on a port, the Layer 2 path is not identified, and an error message appears.
This feature is not supported in Token Ring VLANs.
interface interface-id (Optional) Specify an interface on the source or destination switch.
source-mac-address Specify the MAC address of the source switch in hexadecimal format.
destination-mac-address Specify the MAC address of the destination switch in hexadecimal format.
vlan vlan-id (Optional) Specify the VLAN on which to trace the Layer 2 path that the
packets take from the source switch to the destination switch. Valid VLAN
IDs are 1 to 4094.
detail (Optional) Specify that detailed information appears.
Release Modification
12.2(25)SEF This command was introduced.
- Command Reference 1
- CONTENTS 3
- Contents 10
- OL-8916-01 10
- Audience 15
- Purpose 15
- Conventions 15
- Related Publications 16
- Obtaining Documentation 17
- Documentation Feedback 18
- Submitting a Service Request 20
- CLI Command Modes 23
- User EXEC Mode 25
- Privileged EXEC Mode 25
- Global Configuration Mode 25
- Interface Configuration Mode 26
- VLAN Configuration Mode 27
- Line Configuration Mode 27
- IOS Commands 29
- -lanbasek9-mz.122-25.SEF 41
- Switch# clear vmps statistics 75
- Switch# clear vtp counters 76
- IGMP profile number 147
- Switch(config)# mls qos 207
- Command Description 228
- service-policy 282
- • IP address and network mask 287
- setup express 290
- interface-id 297
- show boot 300
- show dot1x 321
- show eap 324
- show errdisable detect 329
- show errdisable flap-values 331
- show etherchannel 334
- show interfaces 339
- show lacp 362
- show link state group 367
- show mac access-group 369
- show mac address-table 371
- show mac address-table vlan 388
- show mls qos input-queue 392
- show mls qos interface 396
- show mls qos maps 397
- show mls qos queue-set 401
- show monitor 403
- show mvr 406
- show policy-map 417
- show port-security 418
- show spanning-tree 422
- show udld 432
- show vlan 436
- show vmps 445
- show vtp 447
- shutdown vlan 452
- snmp-server enable traps 453
- snmp-server host 456
- snmp trap mac-notification 461
- spanning-tree backbonefast 462
- spanning-tree bpdufilter 464
- spanning-tree bpduguard 466
- • 1000 Mbps—4 467
- • 100 Mbps—19 467
- • 10 Mbps—100 467
- spanning-tree cost 468
- command to display an 469
- spanning-tree guard 473
- spanning-tree link-type 475
- spanning-tree mode 480
- • 1000 Mbps—20000 483
- • 100 Mbps—200000 483
- • 10 Mbps—2000000 483
- spanning-tree mst cost 484
- spanning-tree mst max-age 487
- spanning-tree mst max-hops 488
- spanning-tree mst priority 493
- spanning-tree mst root 494
- spanning-tree port-priority 497
- spanning-tree uplinkfast 503
- spanning-tree vlan 505
- srr-queue bandwidth limit 511
- srr-queue bandwidth shape 512
- srr-queue bandwidth share 514
- storm-control 516
- switchport access 519
- switchport backup interface 521
- switchport block 524
- switchport mode 526
- switchport nonegotiate 528
- switchport port-security 530
- switchport priority extend 538
- switchport trunk 540
- switchport voice vlan 543
- system mtu 545
- traceroute mac 548
- traceroute mac ip 551
- Switch(config)# udld enable 556
- udld port 557
- vlan (global configuration) 560
- vlan (VLAN configuration) 565
- vlan access-map 571
- vlan database 573
- vlan filter 577
- Switch# vmps reconfirm 578
- vmps retry 580
- Switch(config)# vmps retry 7 580
- vmps server 582
- vtp (global configuration) 583
- vtp (VLAN configuration) 587
- Commands 591
- • d—directory 597
- • r—readable 597
- • w—writable 597
- • x—executable 597
- [-test 601
- Debug Commands 617
- • MAC address registry calls 695
- Show Platform Commands 697
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