Explicit NULL config using 3825 router

Unanswered Question
Dec 5th, 2008
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I'm using Cisco 3825 (revision 1.2), Cisco IOS Software, 3800 Software (C3825-IPRANK9-M), Version 12.4(19)MR

I currently have LDP working on two interfaces, and I am also able to configure CESoPSN. The CESoPSN service is using MPLS tunnel, using LDP. The problem, is that Cisco is sending an Implicit NULL label (3).

show mpls ldp bindings

lib entry:, rev 32

local binding: label: imp-null

How can this be changed to Exp-null (0)?

I found a command, but it does not seem to work on my node:

mpls ip encapsulate explicit-null

As shown below, I don't get the option to enter "encapsulate"

SYS22-Cis(config)#interface GigabitEthernet0/0

SYS22-Cis(config-if)#mpls ip ?


Any other idea's? Does my IOS support explicit null?

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trudeau02 Fri, 12/05/2008 - 10:04
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OK. I figured it out :-)

"mpls ldp explicit-null"




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