Questo sito utilizza cookie di profilazione (propri e di terze parti) per ottimizzare la tua esperienza online e per inviarti pubblicità in linea con le tue preferenze. Continuando a utilizzare questo sito senza modificare le tue preferenze acconsenti all’uso dei cookie. Se vuoi saperne di più o negare il consenso a tutti o ad alcuni cookie clicca qui>
The website that you are visiting also provides Arabian language. Do you wish to switch language version?
يوفر موقع الويب الذي تزوره المحتوى باللغة العربية أيضًا. هل ترغب في تبديل إصدار اللغة؟
The website that you are visiting also provides Russia language Do you wish to switch language version?
Данный сайт есть в английской версии. Желаете ли Вы перейти на английскую версию?
The NCT and SHM sites deployed NE40E-X8 and had TE tunnels to the sites at the opposite end. All the TE tunnels, which were established using explicit paths, were controlled by a tunnel policy to share load.
tunnel0/0/480 configured on NCT-1 was the TE tunnel from NCT-1 to SHM-1 and was specified by an explicit path to pass hop POS_1/2/2. Configurations for tunnel0/0/480 and the explicit path are as follows:
description TO Sharm-01-ST
ip address unnumbered interface LoopBack0
tunnel-protocol mpls te
mpls te tunnel-id 480
mpls te record-route label
mpls te path explicit-path sharm10-pos-1/2/2
mpls te igp shortcut
mpls te igp metric absolute 1
mpls te reserved-for-binding
mpls te commit
next hop 10.167.16.34
After a technician ran tracert lsp te tunnel0/0/480 on NCT-1, the following path information was displayed:
<NCT-RNC-NE40E-01>tracert lsp te Tunnel 0/0/480
LSP Trace Route FEC: TE TUNNEL IPV4 SESSION QUERY Tunnel0/0/480 , press CTRL_C to break.
TTL Replier Time Type Downstream
0 Ingress 10.167.16.38/[65545 ]
1 10.64.1.48 17 ms Egress
To address the issue, Huawei performed the following operations and observed the following information:
1. Checked logs of NCT-1 and SHM-1.
On NCT-1, an alarm indicating that POS_1/2/2 was down was found. On SHM-1, no alarm indicating that a POS interface was down was found. Therefore, routes to interface 10.167.16.34 (POS_1/3/0) of SHM-1 were advertised to NCT-1 using OSPF. On NCT-1, as POS_1/2/2 of NCT-1 was down, the egress interface for routes to interface 10.167.16.34 of SHM-1 was POS_5/0/2. As such, during the TE re-establishment process, RSVP packets were forwarded through POS_5/0/2.
2. Checked configurations on NCT-1 and SHM-1.CSPF was disabled. As a result, a CR-LSP was not set up as a strict explicit path, and the tunnel carrying the CR-LSP took POS_5/0/2. When POS_/1/2/2 on NCT-1 became up, the path did not change because the mpls te record-route label command was executed for tunnel0/0/480.
1. When the physical link is normal:
Reset the tunnel, or
Delete the mpls te record-route label command and run the mpls te commit and mpls te record-route label commands for tunnel0/0/480, so a CR-LSP is set up based on the normal routing algorithm.2. Enable CSPF globally.