Networking Requirements
A campus network has two branches. Branch B encounters problems such as network congestion, insufficient bandwidth, and outdated devices. To address these problems, the customer wants to replace devices at the aggregation and access layers of branch B by Huawei devices, with the network plan remaining unchanged.
Figure 2-104 shows the networking before the replacement, on which Cisco switches are deployed. A port channel is established between core switches and between aggregation switches of each branch to provide link redundancy. HSRP is configured on core switches to implement virtual gateway backup. In the networking, Rapid PVST+ is configured on switches to prevent loops.
Figure 2-105 shows the networking after the replacement.
- Use two S12704 switches that set up a CSS to replace Cisco switches CiscoC and CiscoD at the aggregation layer.
- Use the CSS to replace Cisco HSRP. The switchover time upon a CSS single point of failure is shorter than HSRP-based active/standby switchover.
- Interoperate with Cisco switches CiscoA and CiscoB through LACP, CDP, OSPF, and Rapid PVST+.
- Huawei LACP can interoperate with Cisco LACP. For details about the implementation, see Interoperation and Replacement Guide for Link Aggregation on Huawei and Cisco Switches.
- Huawei LLDP can interoperate with Cisco CDP.
- Huawei OSPF can interoperate with Cisco OSPF.
- Huawei VBST can interoperate with Cisco Rapid PVST+. For details about the implementation, see Interoperation and Replacement Guide for Spanning Tree Protocols on Huawei and Cisco Switches.
- Retain the original configurations of Cisco switches such as ACL policies, OSPF, and interface configurations.
- Use two S5730HI switches that set up a stack to replace Cisco access switches CiscoE and CiscoF to improve reliability.
- Retain the original configurations of Cisco switches, such as ACL policies, access terminal negotiation mode, port security, and storm control.
Check Before the Replacement
Before the replacement, run the commands listed in Table 2-123 to check the status of Cisco switches. This facilitates service comparison after the replacement.
| Item | Command |
|---|---|
| Checking the clock status | show clock |
| Checking the interface status | show interface brief |
| Checking the MAC address table | show mac address-table |
| Checking the neighbor status | show cdp neighbors |
| Checking the ARP table | show ip arp |
| Checking the routing table | show ip route |
| Checking the STP status | show spanning-tree summary show spanning-tree detail |
| Checking the existing configurations | show version show running-config |
Configuration Roadmap
Perform service configurations for the S12704 CSS, CiscoA, CiscoB, CiscoC, CiscoD, and S5730HI stack.
- Connect the S12704 CSS to CiscoA and CiscoB through physical cables.
- Connect the S12704 CSS to CiscoC and CiscoD through physical cables.
- Connect the S5730HI stack to the network to replace Cisco access switches CiscoE and CiscoF.
- Disable the switch virtual interfaces (SVIs) on CiscoC and CiscoD and enable VLANIF interfaces for the S12704 CSS. SVIs on Cisco switches are equivalent to VLANIF interfaces on Huawei switches.
- Remove the cables between S12704 CSS and CiscoC and CiscoD and the cables between CiscoC and CiscoD and between CiscoA and CiscoB.
- Check whether services of the terminals connected to the S5730HI stack are normal.
Data Plan
| Device | Link Aggregation Interface | Physical Interface | Function |
|---|---|---|---|
CiscoA | Port-channel 3 | Te2/2 Te4/3 | Interconnection with the S12704 CSS |
CiscoB | Port-channel 3 | Te2/2 Te4/3 | Interconnection with the S12704 CSS |
CiscoC | Port-channel 256 | Gi3/1 Gi3/2 Gi8/1 Gi8/2 | Interconnection with the S12704 CSS |
CiscoD | Port-channel 256 | Gi3/1 Gi3/2 Gi8/1 Gi8/2 | Interconnection with the S12704 CSS |
S12704 CSS | Eth-Trunk 2 | XGE1/1/0/44 XGE1/1/0/45 XGE1/2/0/44 XGE1/2/0/45 | Interconnection with CiscoC |
Eth-Trunk 3 | XGE2/1/0/44 XGE2/1/0/45 XGE2/2/0/44 XGE2/2/0/45 | Interconnection with CiscoD | |
Eth-Trunk 4 | XGE1/2/0/46 XGE2/2/0/46 | Interconnection with CiscoA | |
Eth-Trunk 5 | XGE1/1/0/46 XGE2/1/0/46 | Interconnection with CiscoB |
| Device | Item | Function |
|---|---|---|
CiscoA |
|
|
CiscoB |
|
|
CiscoC | Loopback0: 168.106.7.254 255.255.255.255 | The IP address of Loopback0 is used as the router ID. |
CiscoD | Loopback0: 168.106.7.253 255.255.255.255 | The IP address of Loopback0 is used as the router ID. |
| S12704 CSS | Eth-Trunk 4: 168.106.193.162 255.255.255.252 | Eth-Trunk 4 is used to interconnect with CiscoA. |
Eth-Trunk 5: 168.106.194.162 255.255.255.252 | Eth-Trunk 5 is used to interconnect with CiscoB. | |
LoopBack0: 168.106.7.252 255.255.255.255 | The IP address of Loopback0 is used as the router ID. |
Procedure
- Deploy the two S12704 switches in a CSS and two S5730HI switches in a stack and perform the following configurations:
Configure link aggregation in LACP mode and OSPF between S12704 switches and Cisco core switches, and set the network type of OSPF interfaces to P2P.
# Configure Eth-Trunk 4 and Eth-Trunk 5 in LACP mode for the S12704 CSS and add interfaces to the Eth-Trunks.
<HUAWEI> system-view[HUAWEI] syaname CSS[CSS] interface eth-trunk 4[CSS-Eth-Trunk4] mode lacp[CSS-Eth-Trunk4] quit[CSS] interface eth-trunk 5[CSS-Eth-Trunk5] mode lacp[CSS-Eth-Trunk5] quit[CSS] interface XGigabitEthernet 1/2/0/46[CSS-XGigabitEthernet1/2/0/46] eth-trunk 4[CSS-XGigabitEthernet1/2/0/46] lldp compliance cdp txrx //Enable the interface to exchange information with CDP-capable devices.[CSS-XGigabitEthernet1/2/0/46] quit[CSS] interface XGigabitEthernet 2/2/0/46[CSS-XGigabitEthernet2/2/0/46] eth-trunk 4[CSS-XGigabitEthernet2/2/0/46] lldp compliance cdp txrx[CSS-XGigabitEthernet2/2/0/46] quit[CSS] interface XGigabitEthernet 1/1/0/46[CSS-XGigabitEthernet1/1/0/46] eth-trunk 5 [CSS-XGigabitEthernet1/1/0/46] lldp compliance cdp txrx[CSS-XGigabitEthernet1/1/0/46] quit[CSS] interface XGigabitEthernet 2/1/0/46 [CSS-XGigabitEthernet2/1/0/46] eth-trunk 5[CSS-XGigabitEthernet2/1/0/46] lldp compliance cdp txrx[CSS-XGigabitEthernet2/1/0/46] quit
# Configure OSPF for the S12704 CSS.
[CSS] interface LoopBack0[CSS-LoopBack0] ip address 168.106.7.252 255.255.255.255[CSS-LoopBack0] quit[CSS] interface eth-trunk 4[CSS-Eth-Trunk4] undo portswitch[CSS-Eth-Trunk4] ip address 168.106.193.162 255.255.255.252[CSS-Eth-Trunk4] ospf authentication-mode md5 1 cipher Huawei@123 //The password must be the same as that on the peer end.[CSS-Eth-Trunk4] ospf network-type p2p[CSS-Eth-Trunk4] quit[CSS] interface eth-trunk 5[CSS-Eth-Trunk5] undo portswitch[CSS-Eth-Trunk5] ip address 168.106.194.162 255.255.255.252[CSS-Eth-Trunk5] ospf authentication-mode md5 1 cipher Admin@123 //The password must be the same as that on the peer end.[CSS-Eth-Trunk5] ospf network-type p2p[CSS-Eth-Trunk5] quit[CSS] ospf 100 router-id 168.106.7.252[CSS-ospf-100] silent-interface all[CSS-ospf-100] undo silent-interface Eth-Trunk4[CSS-ospf-100] undo silent-interface Eth-Trunk5 //Except for Eth-Trunk 4 and Eth-Trunk 5, disable the other interfaces from sending and receiving OSPF packets.[CSS-ospf-100] area 0.0.0.0[CSS-ospf-100-area-0.0.0.0] authentication-mode md5 [CSS-ospf-100-area-0.0.0.0] network 168.106.193.160 0.0.0.3[CSS-ospf-100-area-0.0.0.0] network 168.106.194.160 0.0.0.3[CSS-ospf-100-area-0.0.0.0] quit[CSS-ospf-100] quit
# Configure the ICMP attribute for the S12704 CSS.
[CSS] interface eth-trunk 4[CSS-Eth-Trunk4] undo icmp host-unreachable send //Disable the switch from sending ICMP Host Unreachable packets. This prevents the peer device from processing a large number of ICMP packets.[CSS-Eth-Trunk4] undo icmp redirect send //Disable the switch from sending ICMP redirect packets.[CSS-Eth-Trunk4] quit[CSS] interface eth-trunk 5[CSS-Eth-Trunk5] undo icmp host-unreachable send[CSS-Eth-Trunk5] undo icmp redirect send[CSS-Eth-Trunk5] quit
# The related CiscoA and CiscoB configuration files are as follows:- CiscoA configuration file:
! interface Loopback0 ip address 168.106.194.254 255.255.255.255 ! port-channel per-module load-balance ! interface Port-channel3 ip address 168.106.194.161 255.255.255.252 no ip redirects no ip unreachables no ip proxy-arp ip ospf authentication message-digest ip ospf message-digest-key 1 md5 7 1108180B1206 ip ospf network point-to-point ip ospf cost 1000 ! interface TenGigabitEthernet2/2 no ip address channel-group 3 mode active ! interface TenGigabitEthernet4/3 no ip address channel-group 3 mode active ! router ospf 100 router-id 168.106.194.254 area 0 authentication message-digest network 168.106.193.160 0.0.0.3 area 0
- CiscoB configuration file:
! interface Loopback0 ip address 168.106.194.253 255.255.255.255 ! port-channel per-module load-balance ! interface Port-channel3 ip address 168.106.193.161 255.255.255.252 no ip redirects no ip unreachables no ip proxy-arp ip ospf authentication message-digest ip ospf message-digest-key 1 md5 7 104F08170003 ip ospf network point-to-point ip ospf cost 1000 ! interface TenGigabitEthernet2/2 no ip address channel-group 3 mode active ! interface TenGigabitEthernet4/3 no ip address channel-group 3 mode active ! router ospf 100 router-id 168.106.194.253 area 0 authentication message-digest network 168.106.193.160 0.0.0.3 area 0
Connect the S12704 CSS and Cisco aggregation switches CiscoC and CiscoD through Eth-Trunks in LACP mode. Cisco aggregation switches use Rapid PVST+ to prevent loops. Therefore, VBST needs to be enabled for the S12704 CSS to interoperate with Rapid PVST+.
# Configure Eth-Trunk 2 and Eth-Trunk 3 in LACP mode for the S12704 CSS, and add interfaces to the Eth-Trunks.
[CSS] interface eth-trunk 2[CSS-Eth-Trunk2] mode lacp[CSS-Eth-Trunk2] quit[CSS] interface eth-trunk 3[CSS-Eth-Trunk3] mode lacp[CSS-Eth-Trunk3] quit[CSS] interface XGigabitEthernet 1/1/0/44[CSS-XGigabitEthernet1/1/0/44] eth-trunk 2[CSS-XGigabitEthernet1/1/0/44] lldp compliance cdp txrx[CSS-XGigabitEthernet1/1/0/44] quit[CSS] interface XGigabitEthernet 1/1/0/45[CSS-XGigabitEthernet1/1/0/45] eth-trunk 2[CSS-XGigabitEthernet1/1/0/45] lldp compliance cdp txrx[CSS-XGigabitEthernet1/1/0/45] quit[CSS] interface XGigabitEthernet 1/2/0/44[CSS-XGigabitEthernet1/2/0/44] eth-trunk 2[CSS-XGigabitEthernet1/2/0/44] lldp compliance cdp txrx[CSS-XGigabitEthernet1/2/0/44] quit[CSS] interface XGigabitEthernet 1/2/0/45[CSS-XGigabitEthernet1/2/0/45] eth-trunk 2 [CSS-XGigabitEthernet1/2/0/45] lldp compliance cdp txrx[CSS-XGigabitEthernet1/2/0/45] quit[CSS] interface XGigabitEthernet 2/1/0/44[CSS-XGigabitEthernet2/1/0/44] eth-trunk 3 [CSS-XGigabitEthernet2/1/0/44] lldp compliance cdp txrx[CSS-XGigabitEthernet2/1/0/44] quit[CSS] interface XGigabitEthernet 2/1/0/45[CSS-XGigabitEthernet2/1/0/45] eth-trunk 3 [CSS-XGigabitEthernet2/1/0/45] lldp compliance cdp txrx[CSS-XGigabitEthernet2/1/0/45] quit[CSS] interface XGigabitEthernet 2/2/0/44[CSS-XGigabitEthernet2/2/0/44] eth-trunk 3 [CSS-XGigabitEthernet2/2/0/44] lldp compliance cdp txrx[CSS-XGigabitEthernet2/2/0/44] quit[CSS] interface XGigabitEthernet 2/2/0/45[CSS-XGigabitEthernet2/2/0/45] eth-trunk 3 [CSS-XGigabitEthernet2/2/0/45] lldp compliance cdp txrx[CSS-XGigabitEthernet2/2/0/45] quit
# Configure VBST for the S12704 CSS.
[CSS] stp mode vbst[CSS] vlan batch 2 4 33 73[CSS] stp vlan 2 4 33 73 priority 12288[CSS] interface eth-trunk 2[CSS-Eth-Trunk2] port link-type trunk[CSS-Eth-Trunk2] undo port trunk allow-pass vlan 1[CSS-Eth-Trunk2] port trunk allow-pass vlan 2 4 33 73[CSS-Eth-Trunk2] stp no-agreement-check //Configure the common fast transition mechanism on the interface.[CSS-Eth-Trunk2] quit[CSS] interface eth-trunk 3[CSS-Eth-Trunk3] port link-type trunk[CSS-Eth-Trunk3] undo port trunk allow-pass vlan 1[CSS-Eth-Trunk3] port trunk allow-pass vlan 2 4 33 73[CSS-Eth-Trunk3] stp no-agreement-check [CSS-Eth-Trunk3] quit# The related CiscoC and CiscoD configuration files are as follows:- CiscoC configuration file:
! spanning-tree mode rapid-pvst spanning-tree loopguard default no spanning-tree optimize bpdu transmission spanning-tree extend system-id spanning-tree backbonefast spanning-tree vlan 1,33,73 priority 8192 spanning-tree vlan 2,4 priority 4096 port-channel per-module load-balance ! interface GigabitEthernet3/1 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active ! interface GigabitEthernet3/2 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active ! interface GigabitEthernet8/1 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active ! interface GigabitEthernet8/2 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active
- CiscoD configuration file:
! spanning-tree mode rapid-pvst spanning-tree loopguard default no spanning-tree optimize bpdu transmission spanning-tree extend system-id spanning-tree backbonefast spanning-tree vlan 1,33,73 priority 4096 spanning-tree vlan 2,4 priority 8192 port-channel per-module load-balance ! interface GigabitEthernet3/1 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active ! interface GigabitEthernet3/2 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active ! interface GigabitEthernet8/1 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active ! interface GigabitEthernet8/2 switchport switchport trunk allowed vlan 2,4,33,73 switchport mode trunk switchport nonegotiate channel-group 256 mode active
Create VLANIF2 for the S12704 CSS and create VLAN2 on Cisco aggregation switches CiscoC and CiscoD to advertise routes of CiscoC and CiscoD to the S12704 CSS.
# Perform the following configurations for the S12704 CSS:
[CSS] interface Vlanif2[CSS-Vlanif2] ip address 168.106.7.7 255.255.255.128[CSS-Vlanif2] undo icmp host-unreachable send[CSS-Vlanif2] undo icmp redirect send[CSS-Vlanif2] ospf authentication-mode md5 1 cipher Huawei@345[CSS-Vlanif2] ospf dr-priority 95[CSS-Vlanif2] quit[CSS] ospf 100 router-id 168.106.7.252[CSS-ospf-100] undo silent-interface Vlanif2[CSS-ospf-100] area 0.0.0.3[CSS-ospf-100-area-0.0.0.3] authentication-mode md5 [CSS-ospf-100-area-0.0.0.3] network 168.106.7.0 0.0.0.127[CSS-ospf-100-area-0.0.0.3] quit[CSS-ospf-100] quit
# The related CiscoC and CiscoD configuration files are as follows:- CiscoC configuration file:
! interface Loopback0 ip address 168.106.7.254 255.255.255.255 ! interface Vlan2 ip address 168.106.7.2 255.255.255.128 no ip redirects no ip unreachables no ip proxy-arp ip ospf authentication message-digest ip ospf message-digest-key 1 md5 7 094D4F071C11 ip ospf priority 105 ! router ospf 100 router-id 168.106.7.254 area 3 authentication message-digest passive-interface default no passive-interface Vlan2 network 168.106.7.0 0.0.0.127 area 3
- CiscoD configuration file:
! interface Loopback0 ip address 168.106.7.253 255.255.255.255 ! interface Vlan2 ip address 168.106.7.3 255.255.255.128 no ip redirects no ip unreachables no ip proxy-arp ip ospf authentication message-digest ip ospf message-digest-key 1 md5 7 094D4F071C11 ip ospf priority 100 ! router ospf 100 router-id 168.106.7.253 area 3 authentication message-digest passive-interface default no passive-interface Vlan2 network 168.106.7.0 0.0.0.127 area 3
- Use physical cables to connect the S12704 CSS and Cisco core switches CiscoA and CiscoB through the Eth-Trunks in LACP mode, as shown in Figure 2-106.
# After cables are connected, run the display ospf peer brief command to check whether OSPF is running properly. The following information indicates that OSPF is running properly:
<CSS> display ospf peer brief OSPF Process 1 with Router ID 168.106.7.252 Peer Statistic Information ---------------------------------------------------------------------------- Area Id Interface Neighbor id State 0.0.0.0 Eth-Trunk4 168.106.194.254 Full 0.0.0.0 Eth-Trunk5 168.106.194.253 Full ---------------------------------------------------------------------------- Total Peer(s): 2# Ping CiscoA and CiscoB to check the connectivity between the S12704 CSS and CiscoA and CiscoB. CiscoA is used as an example. The following information indicates that CiscoA is pinged successfully.
<CSS> ping 168.106.194.161 PING 168.106.194.161: 56 data bytes, press CTRL_C to break Reply from 168.106.194.161: bytes=56 Sequence=1 ttl=253 time=62 ms Reply from 168.106.194.161: bytes=56 Sequence=2 ttl=253 time=16 ms Reply from 168.106.194.161: bytes=56 Sequence=3 ttl=253 time=62 ms Reply from 168.106.194.161: bytes=56 Sequence=4 ttl=253 time=94 ms Reply from 168.106.194.161: bytes=56 Sequence=5 ttl=253 time=63 ms --- 168.106.194.161 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 16/59/94 ms - Use physical cables to connect the S12704 CSS and Cisco aggregation switches CiscoC and CiscoD through the Eth-Trunks in LACP mode, as shown in Figure 2-107.
# After cables are connected, run the display stp brief command to check the VBST status. The status of Eth-Trunk 2 and Eth-Trunk 3 is normal in different VLANs.
<CSS> display stp brief VLAN-ID Port Role STP State Protection 2 Eth-Trunk2 ALTE DISCARDING NONE 2 Eth-Trunk3 ROOT FORWARDING NONE 4 Eth-Trunk2 ALTE DISCARDING NONE 4 Eth-Trunk3 ROOT FORWARDING NONE 33 Eth-Trunk2 ROOT FORWARDING NONE 33 Eth-Trunk3 ALTE DISCARDING NONE 73 Eth-Trunk2 ROOT FORWARDING NONE 73 Eth-Trunk3 ALTE DISCARDING NONE# Run the display ospf peer brief command to check whether routes of CiscoC and CiscoD have been advertised to the S12704 CSS. The following information indicates that OSPF is running properly:
<CSS> display ospf peer brief OSPF Process 1 with Router ID 168.106.7.252 Peer Statistic Information ---------------------------------------------------------------------------- Area Id Interface Neighbor id State 0.0.0.0 Eth-Trunk4 168.106.194.254 Full 0.0.0.0 Eth-Trunk5 168.106.194.253 Full 0.0.0.3 Vlanif2 168.106.7.254 Full 0.0.0.3 Vlanif2 168.106.7.253 Full ---------------------------------------------------------------------------- Total Peer(s): 4# Ping CiscoC and CiscoD to check the connectivity between the S12704 CSS and CiscoC and CiscoD. CiscoC is used as an example. The following information indicates that CiscoC is pinged successfully.<CSS> ping 168.106.7.254 PING 168.106.7.254: 56 data bytes, press CTRL_C to break Reply from 168.106.7.254: bytes=56 Sequence=1 ttl=253 time=62 ms Reply from 168.106.7.254: bytes=56 Sequence=2 ttl=253 time=16 ms Reply from 168.106.7.254: bytes=56 Sequence=3 ttl=253 time=62 ms Reply from 168.106.7.254: bytes=56 Sequence=4 ttl=253 time=94 ms Reply from 168.106.7.254: bytes=56 Sequence=5 ttl=253 time=63 ms --- 168.106.7.254 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 16/59/94 ms - Configure the S5730HI switches in a stack. Disconnect a physical link between CiscoC and CiscoE, and connect one end of the physical link to the uplink interface of the S5730HI stack and the other end to the S12704 CSS. Migrate cables connecting to downlink interfaces of CiscoE to the corresponding downlink interfaces of the S5730HI. Migrate the other physical link between CiscoC and CiscoE in a similar manner. Migrate the other access switches using the same method. After the operations are completed, run the commands listed in Table 2-126 for the S5730HI stack to verify that services are running properly. The STP status does not need to be checked.
- Run the shutdown command to disable the SVIs on Cisco aggregation switches CiscoC and CiscoD where the interface vlan command has been run. The VLANIF interfaces of the S12704 CSS are in Down state (excluding VLANIF2 corresponding to VLAN2). Then run the undo shutdowncommand on a VLANIF interface to enable the VLANIF interface for the S12704 CSS. Migrate the gateway from CiscoC and CiscoD to the S12704 CSS. After the operations are completed, run the commands listed in Table 2-126 for the S12704 CSS to verify that services are running properly.
- Remove the cables between S12704 CSS and CiscoC and CiscoD and the cables between CiscoC and CiscoD and between CiscoA and CiscoB. Delete configurations such as the Eth-Trunk, OSPF, and VBST that are related to CiscoC and CiscoD from the S12704 CSS. After the operations are completed, run the commands listed in Table 2-126 for the S12704 CSS to verify that services are running properly.
- Check whether services connected to the S5730HI stack are normal, for example, whether PCs can access the Internet properly and whether APs can provide wireless access.
Check After the Replacement
After the replacement, run the commands listed in Table 2-126 to check the status and entries of Huawei switches and compare them with those on Cisco switches before the replacement. Ensure that routing table entries, ARP table entries, MAC address table entries, and neighbors remain unchanged after the replacement. This can only preliminarily determine whether the network devices are normal. To check whether the migration is successful, check the service status.
| Item | Command |
|---|---|
| Checking the clock status | display clock |
| Checking the interface status | display interface brief |
| Checking the MAC address table | display mac-address |
| Checking the neighbor status | display lldp neighbor |
| Checking the ARP table | display arp |
| Checking the routing table | display ip routing-table |
| Checking the STP status | display stp brief display stp global |
| Checking the existing configurations | display current-configuration display saved-configuration |
| Checking logs and alarms | display logbuffer display alarm active display alarm history |
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