Troubleshooting Guide
Table Of Contents
- Contents
- Chapter 1: Introduction
- Chapter 2: Safety messages
- Chapter 3: New in this document
- Chapter 4: Data collection required for Technical Support cases
- Chapter 5: Troubleshooting planning fundamentals
- Chapter 6: Troubleshooting fundamentals
- Chapter 7: Troubleshooting tool fundamentals
- Chapter 8: Log and trap fundamentals
- Chapter 9: Log configuration using ACLI
- Configuring a UNIX system log and syslog host
- Configuring secure forwarding
- Installing root certificate for syslog client
- Configuring logging
- Configuring the remote host address for log transfer
- Configuring system logging to external storage
- Configuring system message control
- Extending system message control
- Viewing logs
- Configuring ACLI logging
- Chapter 10: Log configuration using EDM
- Chapter 11: SNMP trap configuration using ACLI
- Chapter 12: SNMP trap configuration using EDM
- Chapter 13: Traps reference
- Chapter 14: Hardware troubleshooting
- Chapter 15: Software troubleshooting
- Chapter 16: Software troubleshooting tool configuration using ACLI
- Using ACLI for troubleshooting
- Using software record dumps
- Using trace to diagnose problems
- Using trace to diagnose IPv6 problems
- Viewing and deleting debug files
- Configuring port mirroring
- Configuring global mirroring actions with an ACL
- Configuring ACE actions to mirror
- Clearing ARP information for an interface
- Flushing routing, MAC, and ARP tables for an interface
- Pinging an IP device
- Running a traceroute test
- Showing SNMP logs
- Using trace to examine IS-IS control packets
- Viewing the metric type of IS-IS route in TLVs – detailed
- Viewing the metric type of IS-IS route in TLVs – summarized
- Chapter 17: Software troubleshooting tool configuration using EDM
- Chapter 18: Layer 1 troubleshooting
- Chapter 19: Operations and Management
- CFM fundamentals
- CFM configuration using ACLI
- Autogenerated CFM
- Configuring explicit mode CFM
- Displaying SPBM nodal configuration
- Configuring simplified CFM SPBM
- Triggering a loopback test (LBM)
- Triggering linktrace (LTM)
- Triggering a Layer 2 ping
- Triggering a Layer 2 traceroute
- Triggering a Layer 2 tracetree
- Triggering a Layer 2 tracemroute
- Using trace CFM to diagnose problems
- Using trace SPBM to diagnose problems
- CFM configuration using EDM
- Autogenerated CFM
- Configuring explicit CFM
- Configuring Layer 2 ping
- Initiating a Layer 2 traceroute
- Viewing Layer 2 traceroute results
- Configuring Layer 2 IP ping
- Viewing Layer 2 IP Ping results
- Configuring Layer 2 IP traceroute
- Viewing Layer 2 IP traceroute results
- Triggering a loopback test
- Triggering linktrace
- Viewing linktrace results
- Configuring Layer 2 tracetree
- Viewing Layer 2 tracetree results
- Configuring Layer 2 trace multicast route on a VLAN
- Configuring Layer 2 tracemroute on a VRF
- Viewing Layer 2 trace multicast route results
- CFM configuration example
- Chapter 20: Upper layer troubleshooting
- Troubleshooting SNMP
- Troubleshooting DHCP
- Troubleshooting DHCP Relay
- Troubleshooting client connection to the DHCP server
- Troubleshooting IPv6 DHCP Relay
- IPv6 DHCP Relay switch side troubleshooting
- IPv6 DHCP Relay server side troubleshooting
- IPv6 DHCP Relay client side troubleshooting
- Enabling trace messages for IPv6 DHCP Relay
- Troubleshooting IPv6 VRRP
- VRRP transitions
- Enabling trace messages for IPv6 VRRP troubleshooting
- Risks associated with enabling trace messages
- VRRP with higher priority running as backup
- Downgrading or upgrading from releases that support different key sizes
- Troubleshooting IPv6 connectivity loss
- Troubleshooting TACACS+
- Troubleshooting RSMLT
- Chapter 21: Unicast routing troubleshooting
- Chapter 22: Multicast troubleshooting
- Chapter 23: Multicast routing troubleshooting using ACLI
- Viewing IGMP interface information
- Viewing multicast group trace information for IGMP snoop
- Viewing IGMP group information
- Showing the hardware resource usage
- Using PIM debugging commands
- Determining the protocol configured on the added VLAN
- Determining the data stream learned with IP Multicast over Fabric Connect on the VLAN
- Displaying the SPBM multicast database
- Troubleshooting IP Multicast over Fabric Connect for Layer 2 VSNs
- Troubleshooting IP Multicast over Fabric Connect for Layer 3 VSNs
- Troubleshooting IP Multicast over Fabric Connect for IP Shortcuts
- Defining the IS-IS trace flag for IP multicast
- Chapter 24: Multicast routing troubleshooting using EDM
- Viewing IGMP interface information
- Viewing IGMP snoop trace information
- Viewing IGMP group information
- Viewing multicast group sources
- Viewing multicast routes by egress VLAN
- Enabling multicast routing process statistics
- Determining the data stream learned when IP Multicast over Fabric Connect is configured on the VLAN
- Showing the SPBM multicast database
- Chapter 25: Transparent Port UNI feature troubleshooting using ACLI
- Chapter 26: Troubleshooting MACsec
- Chapter 27: Troubleshooting MACsec using EDM
- Chapter 28: Troubleshooting Fabric Attach
- Troubleshooting Fabric Attach using the ACLI
- Troubleshooting Fabric Attach using the EDM
- Fabric Attach troubleshooting example
Example
VSP-4850GTS# l2 tracetree 500 1
VSP-4850GTS# l2 tracetree 500 1
Please wait for l2tracetree to complete or press any key to abort
l2tracetree to 53:55:10:00:00:01, vlan 500 i-sid 1 nickname 5.55.10
hops 64
1 VSP-PETER4 00:15:9b:11:33:df -> VSP-MONTI0 00:14:0d:a2:b3:df
2 VSP-MONTI0 00:14:0d:a2:b3:df -> VSP-LEE2 00:15:e8:b8:a3:df
Variable definitions
Use the data in the following table to use the l2 tracetree command.
Variable Value
{<1-4059> <1–16777215>
routernodename WORD<0–255> |
<1-4059> <1–16777215> mac
<0x00:0x00:0x00:0x00:0x00:0x00>}
• <1-4059>
Specifies the VLAN ID in the range of 1 to 4059. VLAN IDs 1
to 4059 are configurable. The system reserves VLAN IDs
4060 to 4094 for internal use. VLAN ID 1 is the default VLAN
and you cannot create or delete VLAN ID 1.
• <1–16777215> — Specifies the I-SID.
• WORD<0–255> — Specifies the Router Node Name.
• <0x00:0x00:0x00:0x00:0x00:0x00> — Specifies the MAC
address.
ttl-value<1–255> Specifies the TTL value. The default is 64.
priority <0–7> Specifies the priority value. The default is 7.
source-mode <nodal|noVlanMac|
smltVirtual>
Specifies the source mode:
• 1: nodal
• 2: smltVirtual
The default is nodal.
Triggering a Layer 2 tracemroute
Use this procedure to debug the IP Multicast over Fabric Connect stream path using l2
tracemroute on the VLAN (Layer 2) or the VRF (Layer 3). This procedure queries the SPBM
multicast module to determine the B-VLAN, I-SID and nickname for the S and G streams. The
nickname and I-SID are used to create a multicast MAC address.
Note:
The VLAN option is only valid for a VLAN that has an I-SID configured and IGMP snooping
enabled.
CFM configuration using ACLI
January 2017 Troubleshooting 175
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