IPExpert V3 Lab7

Troubleshooting

Difficulties with an inter-as mpls peering, option C like, using bgp to exchange label for bgp routes.

Configuration

1.5 PPPOE with DHCP reservation

Multiple ways to assign IP in PPP/PPPOE:

Client Server
IPCP (ip add negot) Local pool (peer default ip address pool )
dhcp pool (peer default ip address dhcp-pool )
DHCP (ip add dhcp) dhcp pool (nothing)

For manual bindings, user full dhcp version : a host pool should exist and client should be configured with client-identifier
Client
ip address dhcp client f0/0

Server
ip dhcp pool R1
host 10.1.1.1 /24
client-identifier 01+mac-adress of client F0/0

For IPCP you could force client to request mask
PPP ipcp mask request on client
ppp ipcp mask 255... on server

If Vrf is used the pool should be configured with vrf command

3.2 BGP loop because of RIP summarization

RIP summarize a route. Later it's asked to redistribute RIP in BGP, this cause a loop with summary. The summary has to be filtered in redistribution to BGP

4.4 AS Override

Took a while to find again this command that permits the PE to override originator AS by this OWN (in case every vpn site use the same AS, loop prevention will prevent to re-enter)
Another solution could be allow-as in on CE.

5.3 MSDP Oringiator

MSDP orignator id in case of anycast has to be set to the anycast address.
Took a while to discover that I should another route for multicast between to AS as direct link for not allowed for multicast

7.1 NTP multicast

On server side
int
ntp multicast group

On client side
int
ntp multicas client group