[c-nsp] Bundling/using multiple PPPoE sessions

[Michael Markstaller]

Hi,

I've one 1760 running 12.3(7)T7 as CPE on two ADSL lines, CEF per packet sharing, which worked very fine for months with the config below, but since approx. 3 weeks the connection looses >50% pkts when both PPPoE-sessions are up. 
Each line seperately still works fine and now I tried to put another 1712 on two (different) DSL-lines and I haven't even managed to create 2 concurrent PPPoE sessions at all! Not with 12.3(7)T10, not with 12.4(1), not with 12.4(1a)..

My guess is, it has something to do with the duplicate mac-addresses on client side, probably the carrier changed some behavior in the DSLAM but as I didn't got it working at all with the second one I wonder wether this might also be some Cisco "feature" and I just had luck with the first one.
The next thing tomorrow I'll try to plug one of the DSL-lines on Fast0 to get have a different client mac-addr..

But just to make sure: Anybody running multiple PPPoE sessions with 17xx who can confirm this working stable at all ?


The config (I also tried other combinations but currently I'm stuck with 1 PPPoE session at any time..)
--- cut ---
vpdn enable
!
vpdn-group 10
 request-dialin
  protocol pppoe
!
interface FastEthernet1/1
 description WAN-Interface to T-DSL #1
 bandwidth 1024
 no ip address
 load-interval 30
 no cdp enable
!
interface FastEthernet1/2
 description WAN-Interface to T-DSL #2
 bandwidth 1024
 no ip address
 load-interval 30
 no cdp enable
!
interface Vlan1
 description Vlan/WAN-Interface to T-DSL
 bandwidth 2048
 no ip address
 no ip proxy-arp
 load-interval 30
 pppoe enable
 pppoe-client dial-pool-number 12
 pppoe-client dial-pool-number 11
!
interface Dialer11
 ip address negotiated
 ip access-group 160 in
 ip mtu 1456
 ip load-sharing per-packet
 ip nat outside
 ip inspect INSPECT-RULE1 out
 encapsulation ppp
 ip route-cache flow
 dialer pool 11
 dialer vpdn
 dialer-group 11
 no peer default ip address
 no cdp enable
 ppp authentication pap callin
 ppp multilink
 ppp timeout authentication 180
 crypto map VPN
!
interface Dialer12
 dialer pool 12
 dialer vpdn
 dialer-group 12
 ... (the same as Di11)
--- cut ---

BTW, I get DSL-subscribers delivered as PPPoE on a LNS via L2TP, so I've no access to the DSLAM but would see other problems there.. nothing changed on the LNS..


Michael