Hello. My TNT is connected to OC3-ATM network (our own network) and ATM connections are configured in RADIUS (permconns). There are multiple switches/routers on the way to the other end. Lets say the connection (IP) I need to test is between TNT and Cisco 3810 connected to Frame Relay behind that ATM network where my TNT is connected. Cisco has IP address configured in serial interface and that same ip address is used when configuring atm connection to TNT. But there is no ip address on TNT side... When I try to ping Cisco, TNT sends echo request to Cisco, but what is the source address which TNT uses for that packet? Is it system ip address (ip-global) as I assume, and therefore Cisco doesn't know any route to send echo reply. Source address should be that other address of the network configured between TNT and Cisco, but how can I do that? Because it's not necessary to configure "local ip address" in tnt, I don't want to. My clients have ISDN routers dialing in to TNT and they are router to ATM using ATM-Direct. So only way to test some customer's ATM connection from TNT is to ping that other end from ISDN router. But I need to do that testing before ISDN router is in place, just to be sure, that trunk connection is ok. How does that oamloop command works? Does it only go to the next switch and then come back which isn't enough in this case because Cisco is behind ATM-FR. I also use Vrouters. Here are some information about my setup: wan 237 is that ATM connection (dtietesti-atm), and wanabe routes are ISDN routers. admin> netstat dtietesti-vrou -r Destination Gateway IF Flg Pref Met Use Age 127.0.0.0/8 - bh0_dtietes CP 0 0 0 1386726 127.0.0.1/32 - local CP 0 0 0 1386726 127.0.0.2/32 - rj0_dtietes CP 0 0 0 1386726 172.25.60.128/30 172.25.60.130 wan237 rGT 60 1 0 149308 172.25.60.130/32 172.25.60.130 wan237 rT 60 1 4 149308 195.237.41.136/29 195.237.41.137 wanabe SG 100 1 10 149318 195.237.41.216/29 195.237.41.217 wanabe SG 100 1 10 149318 admin> permconn Active Yes User-Name dtietesti-atm Send-auth-mode 0 Ascend-Call-Type 1 Ascend-Group 5 Ascend-Nailed-Grp 5 Ascend-Data-Srv 1 Ascend-PRI-Number-Type 2 HostAddress [172.25.60.130] Netmask [255.255.255.252] wanAlias [0.0.0.0] ifAddress [0.0.0.0] ifNetmask [0.0.0.0] Metric 1 Dial number [] Clid [] Dnis [] Framed-Protocol 20 Ascend-ATM-Vpi 0 Ascend-ATM-Vci 180 Ascend-Dsl-Type-Mode:0 Ascend-Dsl-Rate-Mode:1 adsl Cap Ascend-Dsl-Upstream-Limit:50 adsl Cap Ascend-Dsl-Downstream-Limit:6 adsl Dmt Ascend-Dsl-Upstream-Limit:153 adsl Dmt Ascend-Dsl-Downstream-Limit:103 sdsl Ascend-Dsl-UpDownstream-Limit:4 admin> ping -c 1 -r dtietesti-vrou -x 172.25.60.129 172.25.60.130 ping: invalid source address "172.25.60.129" Regards, Jyrki Kainulainen. ++ Ascend Users Mailing List ++ To unsubscribe: send unsubscribe to ascend-users-request at bungi.com To get FAQ'd: <http://www.nealis.net/ascend/faq>