Lsp Selector Ipv4 - Cisco XR 1200 series Command Reference Manual

lsp selector ipv4

lsp selector ipv4
To specify the local host IPv4 address used to select an LSP, use the lsp selector ipv4 command in the
appropriate configuration mode. To clear the host address, use the no form of this command.
lsp selector ipv4 ip-address
no lsp selector ipv4
Syntax Description
ip-address
Command Default
The local host IP address used to select the LSP is 127.0.0.1.
Command Modes
IP SLA MPLS LSP ping configuration
IP SLA MPLS LSP trace configuration
IP SLA MPLS LSP monitor ping configuration
IP SLA MPLS LSP monitor trace configuration
Command History
Release
Release 3.4.0
Release 3.5.0
Usage Guidelines
Use the lsp selector ipv4 command to force an MPLS LSP ping or MPLS LSP trace operation to use a specific
LSP when there are multiple equal cost paths between provider edge (PE) routers. This situation occurs when
transit label switching routers (LSRs) use the destination address in IP packet headers for load balancing.
The IPv4 address configured with the lsp selector ipv4 command is the destination address in the User
Datagram Protocol (UDP) packet sent as the MPLS echo request. Valid IPv4 addresses are defined in the
subnet 127.0.0.0/8 and used to:
• Force the packet to be consumed by the router where an LSP breakage occurs.
• Force processing of the packet at the terminal point of the LSP if the LSP is intact.
• Influence load balancing during forwarding when the transit routers use the destination address in the
If the lsp selector ipv4 command is used in IP SLA operation mode, it acts on the MPLS echo requests for
the specific operation being configured. If the lsp selector ipv4 command is used in IP SLA MPLS LSP
Cisco IOS XR System Monitoring Command Reference for the Cisco XR 12000 Series Router, Release 4.1
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IP header for load balancing.
A local host IPv4 address used to select the LSP.
Modification
This command was introduced.
This command was added to IP SLA MPLS LSP monitor ping and
monitor trace configuration modes.
IP Service Level Agreement Commands
OL-24735-01