No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

NE20E-S V800R010C10SPC500 Feature Description - Value-Added-Service 01

This is NE20E-S V800R010C10SPC500 Feature Description - Value-Added-Service
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
SRv6 OAM

SRv6 OAM

SRv6 Operation, Administration, and Maintenance (OAM) monitors SRv6 path connectivity and rapidly detects faults. SRv6 OAM is implemented using IPv6 ping and tracert.

SRv6 Ping

In Figure 3-7, nodes A, D, G, and Z have SRv6 capabilities. An SRv6 tunnel is established between nodes A and Z.
Figure 3-7 SRv6-TE ping/tracert
Node A pings the SRv6 tunnel. The process is as follows:
  1. Node A constructs an IPv6 Echo Request packet that carries whole IPv6 link information <Z, G, D>. The IPv6 DA is set to node D. A searches the IPv6 routing table and forwards the packet to node B.
  2. SRv6-incapable node B cannot process this packet and searches the IPv6 routing table to transparently transmit the packet to node D.
  3. Upon receipt of the packet, node D finds that itself is the IPv6 DA. Node D updates the IPv6 DA and SL information and searches the IPv6 routing table to forward the packet to node F.
  4. SRv6-incapable node F processes the packet in the same way as node B.
  5. Upon receipt of the packet, node G finds that itself is the IPv6 DA and the SL is reduced to 0, indicating that node G is the penultimate node. Node G updates the IPv6 DA, deletes IPv6 link information <Z, G, D>, and searches the IPv6 routing table to send the packet to node Z.
  6. Upon receipt of the packet, node Z processes the received IPv6 packet and sends it to the host transceiver module for processing. Then, node Z returns an IPv6 Echo Reply packet to node A.
  7. Node A receives the IPv6 Echo Reply packet and generates SRv6 ping results. If node A does not receive IPv6 Echo Reply packets, the tracert operation fails.

SRv6 Tracert

The tracert mechanism is similar to the ping mechanism. Tracert first sends a packet with the TTL value of 1. Each time a tracert packet is sent, the TTL increases by one. Tracert checks whether a network connection is reachable and where a fault occurs.

In Figure 3-7, node A initiates a tracert operation on an SRv6 tunnel. The process is as follows:
  1. Node A continuously constructs IPv6 Echo Request packets and forwards them to node D.
  2. Node D checks whether TTL-1 is 0:
    • If TTL-1 is 0, the packets are sent to the host transceiver for processing after the TTL times out.
    • If TTL-1 is greater than 0, node D updates the IPv6 DA and SL information, searches the IPv6 routing table, and forwards the packets to the next-hop node G.
  3. Node G processes them in the same way as D. G checks whether TTL-1 is 0:
    • If TTL-1 is 0, the packets are sent to the host transceiver for processing after the TTL times out.
    • If TTL-1 is greater than 0, node G updates the IPv6 DA and SL information, searches the IPv6 routing table, and forwards the packets to the next-hop node Z.
  4. After common IPv6 packets arrive at node Z, node Z sends the packet to the host transceiver for processing and returns IPv6 Echo Reply packets to node A.
  5. After node A receives IPv6 Echo Reply packets, it generates SRv6 tracert results. If node A does not receive IPv6 Echo Reply packets, the tracert operation fails.
Translation
Download
Updated: 2019-01-03

Document ID: EDOC1100055132

Views: 3056

Downloads: 7

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next