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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 4 Managing and Monitoring Network Management Features
How to Configure Network Management Features on ASR 901
Figure 4-1 Zero-touch Deployment
The following steps provide an overview of events that take place during ASR 901 zero-touch
deployment.
Step 1 Connect the Cisco ASR 901 without any configurations to an upstream router.
Step 2 The ASR 901 auto-senses the management vlan of the upstream router for IP connectivity by listening
to the traffic it receives on the connected interface.
Step 3 The ASR 901 sends DHCP discover messages using the discovered VLAN tag. If the upstream router is
not using a management VLAN, untagged DHCP discover messages are sent.
Step 4 The DHCP server responds with a DHCP offer.
Step 5 The ASR 901 sends a DHCP request message to the DHCP server. The DHCP server then sends the
DHCP ACK message.
Note Step 6 and 7 are used only when Option 43 is not configured.
Step 6 The ASR 901 requests network-config file via TFTP.
Step 7 The TFTP server sends the ASR 901 a network-config file.
Step 8 The ASR 901 sends an HTTP request to the CNS-CE server.
Step 9 The CNS-CE server sends a configuration template to the ASR 901.
Step 10 Publish success event.
Image Download
The following events take place when a CNS-enabled ASR 901 downloads a new image:
Step 1 The CNS-CE server requests inventory (disk/flash info) from the ASR 901-DC.
Step 2 The ASR 901-DC sends an inventory.
Step 3 The CNS-CE server sends an image location.
Configuration
Engine
DHCP Server
L3 Network
DHCP Helper
Cisco ASR 901 router
with no configurations
TFTP Server
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