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pppoe/DSL on PIX 501. LCP error

Hello to all,

I'm putting in a 501 for a customer and I thought I had the config installed correctly. All we are doing is connecting our dsl service (via pppoe) from SBC to the PIX. It's working fine with the Linxsys router in place.

When I put the PIX into the network connecting directly to the modem and to a switch inside the network,I can see the tunnel when doing a show vpdn but I get a LCP error. I called SBC and they confirmed that I should use PAP for the ppp auth. Anyone have any suggestions re the LCP error? thanks!!

PIX Version 6.2(2)

nameif ethernet0 outside security0

nameif ethernet1 inside security100

enable password

passwd encrypted

hostname xyz


fixup protocol ftp 21

fixup protocol http 80

fixup protocol h323 h225 1720

fixup protocol h323 ras 1718-1719

fixup protocol ils 389

fixup protocol rsh 514

fixup protocol rtsp 554

fixup protocol smtp 25

fixup protocol sqlnet 1521

fixup protoco

fixup protocol skinny 2000


pager lines 24

interface ethernet0 10baset

interface ethernet1 10full

mtu outside 1500 <--do I need to change to 1492?

mtu inside 1500 <--do I need to change to 1492?

ip address outside pppoe setroute

ip address inside

ip audit info action alarm

ip audit attack action alarm

pdm history enable

arp timeout 14400

nat (inside) 1 0 0

timeout xlate 3:00:00

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 si

p 0:30:00 sip_media 0:02:00

timeout uauth 0:05:00 absolute

aaa-server TACACS+ protocol tacacs+

aaa-server RADIUS protocol radius

aaa-server LOCAL protocol local

no snmp-server location

no snmp-server contact

snmp-server community public

no snmp-server enable traps

floodguard enable

no sysopt route dnat

telnet timeout 5

ssh timeout 5

vpdn group xyz request dialout pppoe

vpdn group xyz localname

vpdn group xyz ppp authentication pap

vpdn username password *********

dhcpd address inside

dhcpd lease 3600

dhcpd ping_timeout 750

dhcpd domain

dhcpd enable inside

terminal width 80


Re: pppoe/DSL on PIX 501. LCP error

Hi Steve,

Have a read of the following document for your question on Link Control Protocol (LCP):

Hope this helps - Thanks, Jay

New Member

Re: pppoe/DSL on PIX 501. LCP error

Try removing the PAP authentication. I had a similar problem with PPPOE/DSL last week. Took off PAP and everything worked fine.

New Member

Re: pppoe/DSL on PIX 501. LCP error

By the way, I have nothing to do with SBC DSL services. Again, I saw same issue with another DSL provider.

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