Cisco Cisco ASR 5000
Direct Tunnelling for the S4-SGSN
▀ Monitoring and Troubleshooting Direct Tunnel
▄ SGSN Administration Guide, StarOS Release 18
Bulk statistics under the EGTPC schema are applicable for both Direct Tunnel and Idle Mode Signalling Reduction
(ISR) [3G and 2G]. The following statistics track the release access bearer request and response messages which are
sent by the SGSN to the S-GW upon Iu or RAB release when either a direct tunnel or ISR is active:
(ISR) [3G and 2G]. The following statistics track the release access bearer request and response messages which are
sent by the SGSN to the S-GW upon Iu or RAB release when either a direct tunnel or ISR is active:
tun-sent-relaccbearreq
tun-sent-retransrelaccbearreq
tun-recv-relaccbearresp
tun-recv-relaccbearrespDiscard
tun-recv-relaccbearrespaccept
tun-recv-relaccbearrespdenied
The following bulkstats under EGTPC schema track Downlink Data Notification (DDN) Ack and failure messages
between the S-GW and the SGSN when either direct tunnel or ISR is active:
between the S-GW and the SGSN when either direct tunnel or ISR is active:
tun-recv-dlinknotif
tun-recv-dlinknotifDiscard
tun-recv-dlinknotifNorsp
tun-recv-retransdlinknotif
tun-sent-dlinknotifackaccept
tun-sent-dlinknotifackdenied
tun-sent-dlinkdatafail
For complete descriptions of these variables, see the EGTPC Schema Statistics chapter in the Statistics and Counters
Reference.
Reference.