>Hi, > >Can some tell me what is conditional label advertisement with resect >to >mpls and when it can be used
Configuring Conditional label advertisment is considered to be an optional step in MPLS configuration procedure. By default, a router will generate and propagate labels for all networks that it has in the routing table. If only label switching for a limited number of networks is required (for example, only for router loopback addresses), configure the conditional label advertising. By default, labels for all destinations are announced to all LDP/TDP neighbors.Conditional label advertisment enables you to selectively advertise some labels to some LDP/TDP neighbors. Note that it can work only over frame-mode interfaces. You can use it doing the following router(config)#tag-switching advertise-tags for net-acl [ to tdp-acl ] Where as: Net-ACL the IP ACL that selects the destinations for which the labels will be generated. TDP-ACL the IP ACL that selects the TDP neighbors that will receive the labels. >can someone explain the significance of down bit with respect to ospf Down bit is a mechanism that was introduced to prevent route redistribution loops between OSPF running between PE- and CE-routers and multi-protocol BGP running between PE-routers Down bit is an additional bit that has been introduced in the Options field of the OSPF LSA header. PE-routers set the Down bit when redistributing routes from MP-BGP into OSPF. PE-routers never redistribute OSPF routes with Down bit set into MP-BGP. The PE-router that redistributes the MP-BGP route as OSPF route into the OSPF topology database sets the down bit. Other PE-routers use the down bit to prevent this route from being redistributed back into MP-BGP. >maximum how many ospf process can I run on a PE router 32 ( This number is not scalable at all with expected many VRFs configured on the PE router). In general it is not recommended to use OSPF as a routing protocol between the PE & CE because of the limitations that should be taken care of. Hope this helps Yasser > >Kind Regards /Thangavel > > >Kind Regards /Thangavel > >186K >Reading,Brkshire >Direct No -0118 9064259 >Mobile No -07796292416 >Post code: RG16LH >www.186k.co.uk > >---------------------------------------------------------------------- >The greatest glory in living lies not in never falling, > but in rising every time we fall ." > -- Nelson Mandela > >-------------------------------------------------------------------- > > > >********************************************************************** >This e-mail is from 186k Ltd and is intended only for the >addressee named above. As this e-mail may contain confidential >or priveleged information, if you are not the named addressee or >the person responsible for delivering the message to the named >addressee, please advise the sender by return e-mail. The >contents should not be disclosed to any other person nor copies >taken. >186k Ltd is a Lattice Group company, registered in England >& Wales No. 3751494 Registered Office 130 Jermyn Street >London SW1Y 4UR >********************************************************************** _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48185&t=48157 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
