Hi, we are replacing two Layer 2 switches with ASR 920's. The devices were bought before me so we cannot change it. I am configuring the 920's as layer 2 switches. The two switches are connected to each other via portchannels and have a 10G connection to an upstream switch. I have configured MST on the two switches with both the switches in different regions. I have pasted the relevant configs below. I will be deploying it soon and am hoping the following config looks ok? Ports 20-21 are portchannels to the other switch and Te00/24 is the connection to upstream switch. The rest of the port connect to customer equipment. The other switch config is similar.
facility-alarm critical exceed-action shutdown
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multilink bundle-name authenticated
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license feature port bulk
license udi pid ASR-920-24TZ-M sn CAT2123V0HH
license boot level metroipaccess
archive
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spanning-tree mode mst
spanning-tree pathcost method long
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spanning-tree mst configuration
name SWI05
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spanning-tree mst 0 priority 61440
spanning-tree vlan 1-4094 priority 61440
sdm prefer default
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redundancy
bridge-domain 1
bridge-domain 260
bridge-domain 555
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transceiver type all
monitoring
cdp run
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interface Port-channel1
no ip address
negotiation auto
spanning-tree mst 0 cost 21000
service instance trunk 1 ethernet
encapsulation dot1q 1-2000
rewrite ingress tag pop 1 symmetric
l2protocol peer cdp stp
bridge-domain from-encapsulation
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interface GigabitEthernet0/0/0
description AA
no ip address
negotiation auto
service instance 1 ethernet
encapsulation untagged
bridge-domain 1
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interface GigabitEthernet0/0/1
no ip address
negotiation auto
service-policy BB
service instance 260 ethernet
encapsulation untagged
bridge-domain 260
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interface GigabitEthernet0/0/2
no ip address
speed 100
no negotiation auto
spanning-tree portfast
service instance 80 ethernet
description CC
encapsulation untagged
bridge-domain 80
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interface GigabitEthernet0/0/3
description DD
no ip address
negotiation auto
service instance 520 ethernet
encapsulation untagged
bridge-domain 520
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interface GigabitEthernet0/0/4
no ip address
negotiation auto
spanning-tree portfast
service instance 85 ethernet
encapsulation untagged
bridge-domain 85
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interface GigabitEthernet0/0/20
description Portchannel to switch2
no ip address
negotiation auto
cdp enable
channel-group 1
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interface GigabitEthernet0/0/21
description Portchannel to switch2
no ip address
negotiation auto
cdp enable
channel-group 1
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interface GigabitEthernet0/0/22
no ip address
negotiation auto
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interface GigabitEthernet0/0/23
!
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interface TenGigabitEthernet0/0/24
description Fibre Link to upstream
no ip address
cdp enable
service instance trunk 1 ethernet
encapsulation dot1q 2-2000
rewrite ingress tag pop 1 symmetric
l2protocol peer cdp stp
bridge-domain from-encapsulation
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service instance 2 ethernet
encapsulation untagged
l2protocol peer cdp stp
bridge-domain 1
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interface TenGigabitEthernet0/0/25
no ip address
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interface TenGigabitEthernet0/0/26
no ip address
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interface TenGigabitEthernet0/0/27
no ip address
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interface GigabitEthernet0
vrf forwarding Mgmt-intf
negotiation auto
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interface BDI555
ip address x.x.x.1
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ip default-gateway x.x.x.2
ip forward-protocol nd
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ip route 0.0.0.0 0.0.0.0 x.x.x.2
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